chore: Db linting (cosmos#12141)

* mainly sdk.int to cosmossdk.io/math

* staking keys

* fumpt

* var-naming linter errors and a fumpt

* Update CHANGELOG.md

* Update .golangci.yml

* Update CHANGELOG.md

* Update test_helpers.go

* Update test_helpers.go

* fumpt and lint

* this lints the db module, and makes it easier to use.  It adds breaking name changes

* DBConnection -> Connection

* previous commit contained a merge error

* Update test_helpers.go

* Update test_helpers.go

* db renamings

* merge master

* changelog

* DBWriter -> Writer

* consistent multistore reciever

* standard recievers for multistore v2alpha1

* general cleanup of linting issues

* more linter fixes

* remove prealloc linter

* nolint the secp256k1 import

* nolint the secp256k1 package

* completenolint resulting in a diff that has only nolints

test_helpers.go

@@ -18,16 +18,15 @@ import (
 	tmtypes "github.com/tendermint/tendermint/types"
 	dbm "github.com/tendermint/tm-db"
 
-	bam "github.com/cosmos/cosmos-sdk/baseapp"
 	"cosmossdk.io/math"
-	"github.com/cosmos/cosmos-sdk/depinject"
-	bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
+	bam "github.com/cosmos/cosmos-sdk/baseapp"
 	"github.com/cosmos/cosmos-sdk/client"
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
 	cryptocodec "github.com/cosmos/cosmos-sdk/crypto/codec"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
 	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
+	"github.com/cosmos/cosmos-sdk/depinject"
 	"github.com/cosmos/cosmos-sdk/server/types"
 	"github.com/cosmos/cosmos-sdk/simapp/helpers"
 	"github.com/cosmos/cosmos-sdk/simapp/params"
@@ -36,6 +35,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/errors"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
+	bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
 	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
 	minttypes "github.com/cosmos/cosmos-sdk/x/mint/types"
 	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"