fix(ko): Do not add -trimpath when debugging

`ko` adds the `-trimpath` flag to `go build` by default, as this aids in
achieving reproducible builds.

The `-trimpath` flag removes file system paths from the resulting
binary, and this makes interactive debugging more difficult.

This change instructs `ko` to _not_ add the `-trimpath` flag when users
run `skaffold debug` with the `ko` builder.

Bumps the `ko` version to pick up the `Trimpath` build option.

Also, simplifies the `ko` example config since it's no longer necessary
to add a non-empty `flags` field to `skaffold.yaml` to allow for
interactive debugging.

Fixes: GoogleContainerTools#6843
Tracking: GoogleContainerTools#6041

go.mod

@@ -28,7 +28,7 @@ require (
 	github.com/AlecAivazis/survey/v2 v2.2.15
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.20.0
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/trace v0.20.0
-	github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d // indirect
+	github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d
 	github.com/ahmetalpbalkan/dlog v0.0.0-20170105205344-4fb5f8204f26 // indirect
 	github.com/ahmetb/dlog v0.0.0-20170105205344-4fb5f8204f26
 	github.com/aws/aws-sdk-go v1.36.30 // indirect
@@ -38,7 +38,7 @@ require (
 	github.com/buildpacks/lifecycle v0.10.2
 	github.com/buildpacks/pack v0.18.1
 	github.com/cenkalti/backoff/v4 v4.1.1
-	github.com/docker/cli v20.10.7+incompatible
+	github.com/docker/cli v20.10.10+incompatible
 	github.com/docker/distribution v2.7.1+incompatible
 	github.com/docker/docker v20.10.10+incompatible
 	github.com/docker/go-connections v0.4.0
@@ -50,11 +50,11 @@ require (
 	github.com/golang/protobuf v1.5.2
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/go-cmp v0.5.6
-	github.com/google/go-containerregistry v0.6.0
+	github.com/google/go-containerregistry v0.7.0
 	github.com/google/go-containerregistry/pkg/authn/k8schain v0.0.0-20210216200643-d81088d9983e // indirect
 	github.com/google/go-github v17.0.0+incompatible
 	github.com/google/go-querystring v1.1.0 // indirect
-	github.com/google/ko v0.9.4-0.20211102213605-98211906053b
+	github.com/google/ko v0.9.4-0.20211117220415-2fbc9089eb17
 	github.com/google/uuid v1.3.0
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.5.0
 	github.com/heroku/color v0.0.6
@@ -90,14 +90,14 @@ require (
 	go.opentelemetry.io/otel/sdk/metric v0.20.0
 	go.opentelemetry.io/otel/trace v0.20.0
 	golang.org/x/mod v0.4.2
-	golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f
+	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac
+	golang.org/x/sys v0.0.0-20211110154304-99a53858aa08
 	golang.org/x/term v0.0.0-20210503060354-a79de5458b56
 	golang.org/x/tools v0.1.7
 	google.golang.org/api v0.57.0
-	google.golang.org/genproto v0.0.0-20211005153810-c76a74d43a8e
-	google.golang.org/grpc v1.41.0
+	google.golang.org/genproto v0.0.0-20211111162719-482062a4217b
+	google.golang.org/grpc v1.42.0
 	google.golang.org/protobuf v1.27.1
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b