Support deploy and manage dm 2.0 (#587)

This PR refactor some code and make tiup-dm support all commands like tiup-cluster(except for `check` and `import`)
- code ` components/cluster/command/*` are move into `pkg/cluster/deploy/` and change it to deploy a general cluster instead of tidb cluster, both tiup-cluster and tiup-dm use it to avoid many duplicate codes, and maybe later for some tiup-** to use it too.
- move `pkg/dm/` into `components/dm`
- many code in pkg/cluster/* are change to support work with a general cluster, I prefer to move code `tiup-cluser` specified code into component/cluster later.
- note tiup-dm does not support monitor yet in this pr.

all the existing command are supported:
```
Deploy a DM cluster for production

Usage:
  tiup-dm [flags]
  tiup-dm [command]

Available Commands:
  deploy      Deploy a DM cluster for production
  start       Start a DM cluster
  stop        Stop a DM cluster
  restart     Restart a DM cluster
  list        List all clusters
  destroy     Destroy a specified DM cluster
  audit       Show audit log of cluster operation
  exec        Run shell command on host in the dm cluster
  edit-config Edit DM cluster config
  display     Display information of a DM cluster
  reload      Reload a DM cluster's config and restart if needed
  upgrade     Upgrade a specified DM cluster
  patch       Replace the remote package with a specified package and restart the service
  scale-out   Scale out a DM cluster
  scale-in    Scale in a DM cluster
  help        Help about any command

Flags:
  -h, --help               help for tiup-dm
      --ssh-timeout int    Timeout in seconds to connect host via SSH, ignored for operations that don't need an SSH connection. (default 5)
  -v, --version            version for tiup-dm
      --wait-timeout int   Timeout in seconds to wait for an operation to complete, ignored for operations that don't fit. (default 60)
  -y, --yes                Skip all confirmations and assumes 'yes'

Use "tiup-dm help [command]" for more information about a command.
```

a cluster may look like:
```
root@control:/tiup-cluster# tdm display test
dm Cluster: test
dm Version: nightly
ID                 Role       Host          Ports      OS/Arch       Status     Data Dir                   Deploy Dir
--                 ----       ----          -----      -------       ------     --------                   ----------
172.19.0.101:8261  dm-master  172.19.0.101  8261/8291  linux/x86_64  Healthy    data                       deploy/dm-master-8261
172.19.0.101:8361  dm-master  172.19.0.101  8361/8292  linux/x86_64  Unhealthy  data                       deploy/dm-master-8361
172.19.0.102:8261  dm-master  172.19.0.102  8261/8291  linux/x86_64  Healthy    data                       deploy/dm-master-8261
172.19.0.103:8261  dm-master  172.19.0.103  8261/8291  linux/x86_64  Healthy    /home/tidb/my_master_data  deploy/dm-master-8261
172.19.0.104:8261  dm-master  172.19.0.104  8261/8291  linux/x86_64  Healthy|L  data                       deploy/dm-master-8261
172.19.0.105:8261  dm-master  172.19.0.105  8261/8291  linux/x86_64  Healthy    data                       deploy/dm-master-8261
172.19.0.101:8280  dm-portal  172.19.0.101  8280       linux/x86_64  Up         data                       deploy/dm-portal-8280
172.19.0.102:8280  dm-portal  172.19.0.102  8280       linux/x86_64  Up         data                       deploy/dm-portal-8280
172.19.0.101:8262  dm-worker  172.19.0.101  8262       linux/x86_64  Free       data                       deploy/dm-worker-8262
172.19.0.101:8263  dm-worker  172.19.0.101  8263       linux/x86_64  Free       data                       deploy/dm-worker-8263
172.19.0.102:8262  dm-worker  172.19.0.102  8262       linux/x86_64  Free       data                       deploy/dm-worker-8262
172.19.0.103:8262  dm-worker  172.19.0.103  8262       linux/x86_64  Free       data                       deploy/dm-worker-8262
172.19.0.104:8262  dm-worker  172.19.0.104  8262       linux/x86_64  Free       data                       deploy/dm-worker-8262
```

components/cluster/command/audit.go

@@ -14,20 +14,8 @@
 package command
 
 import (
-	"bufio"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"sort"
-	"strings"
-	"time"
-
-	"github.com/fatih/color"
-	"github.com/pingcap/errors"
-	"github.com/pingcap/tiup/pkg/base52"
-	"github.com/pingcap/tiup/pkg/cliutil"
+	"github.com/pingcap/tiup/pkg/cluster/audit"
 	"github.com/pingcap/tiup/pkg/cluster/spec"
-	tiuputils "github.com/pingcap/tiup/pkg/utils"
 	"github.com/spf13/cobra"
 )
 
@@ -38,87 +26,13 @@ func newAuditCmd() *cobra.Command {
 		RunE: func(cmd *cobra.Command, args []string) error {
 			switch len(args) {
 			case 0:
-				return showAuditList()
+				return audit.ShowAuditList(spec.AuditDir())
 			case 1:
-				return showAuditLog(args[0])
+				return audit.ShowAuditLog(spec.AuditDir(), args[0])
 			default:
 				return cmd.Help()
 			}
 		},
 	}
 	return cmd
 }
-
-func showAuditList() error {
-	firstLine := func(fileName string) (string, error) {
-		file, err := os.Open(spec.ProfilePath(spec.TiOpsAuditDir, fileName))
-		if err != nil {
-			return "", errors.Trace(err)
-		}
-		defer file.Close()
-
-		scanner := bufio.NewScanner(file)
-		if scanner.Scan() {
-			return scanner.Text(), nil
-		}
-		return "", errors.New("unknown audit log format")
-	}
-
-	auditDir := spec.ProfilePath(spec.TiOpsAuditDir)
-	// Header
-	clusterTable := [][]string{{"ID", "Time", "Command"}}
-	fileInfos, err := ioutil.ReadDir(auditDir)
-	if err != nil && !os.IsNotExist(err) {
-		return err
-	}
-	for _, fi := range fileInfos {
-		if fi.IsDir() {
-			continue
-		}
-		ts, err := base52.Decode(fi.Name())
-		if err != nil {
-			continue
-		}
-		t := time.Unix(ts, 0)
-		cmd, err := firstLine(fi.Name())
-		if err != nil {
-			continue
-		}
-		clusterTable = append(clusterTable, []string{
-			fi.Name(),
-			t.Format(time.RFC3339),
-			cmd,
-		})
-	}
-
-	sort.Slice(clusterTable[1:], func(i, j int) bool {
-		return clusterTable[i+1][1] > clusterTable[j+1][1]
-	})
-
-	cliutil.PrintTable(clusterTable, true)
-	return nil
-}
-
-func showAuditLog(auditID string) error {
-	path := spec.ProfilePath(spec.TiOpsAuditDir, auditID)
-	if tiuputils.IsNotExist(path) {
-		return errors.Errorf("cannot find the audit log '%s'", auditID)
-	}
-
-	ts, err := base52.Decode(auditID)
-	if err != nil {
-		return errors.Annotatef(err, "unrecognized audit id '%s'", auditID)
-	}
-
-	content, err := ioutil.ReadFile(path)
-	if err != nil {
-		return errors.Trace(err)
-	}
-
-	t := time.Unix(ts, 0)
-	hint := fmt.Sprintf("- OPERATION TIME: %s -", t.Format("2006-01-02T15:04:05"))
-	line := strings.Repeat("-", len(hint))
-	_, _ = os.Stdout.WriteString(color.MagentaString("%s\n%s\n%s\n", line, hint, line))
-	_, _ = os.Stdout.Write(content)
-	return nil
-}

components/cluster/command/check.go

@@ -29,7 +29,6 @@ import (
 	operator "github.com/pingcap/tiup/pkg/cluster/operation"
 	"github.com/pingcap/tiup/pkg/cluster/spec"
 	"github.com/pingcap/tiup/pkg/cluster/task"
-	"github.com/pingcap/tiup/pkg/logger"
 	"github.com/pingcap/tiup/pkg/logger/log"
 	"github.com/pingcap/tiup/pkg/meta"
 	tiuputils "github.com/pingcap/tiup/pkg/utils"
@@ -63,8 +62,6 @@ conflict checks with other clusters`,
 				return cmd.Help()
 			}
 
-			logger.EnableAuditLog()
-
 			var topo spec.Specification
 			if opt.existCluster { // check for existing cluster
 				clusterName := args[0]