add command skaffold inspect build-env modify googleCloudBuild

[gsquared94]

Related: #5758
Description

add command skaffold inspect build-env modify googleCloudBuild to modify the build environment definitions of profiles and default pipelines.

User facing changes (remove if N/A)

❯ skaffold inspect build-env modify googleCloudBuild --help
Modify an existing GoogleCloudBuild build environment definition.
Without the '--profile' flag, the default pipeline's build environment
definition is modified. With the '--profile' flag it'll modify the build
environment definition for all profile pipelines that match the given profile
name. 
In these respective scenarios, it will fail if the build env definition for the
default pipeline or the named profile is not GoogleCloudBuild. To create a new
build environment definition use 'skaffold inspect build-env add' command
instead. 
Use the '--module' filter to specify the individual module to target. Otherwise,
it'll be applied to all modules defined in the target file. Also, with the
'--profile' flag if the target config imports other configs as dependencies,
then it'll modify profiles that match the given name in all imported configs

Examples:
  # Modify an existing profile named 'gcb' targeting the builder
'googleCloudBuild' against the GCP project ID '1234'.
  skaffold inspect build-env modify googleCloudBuild --profile gcb --projectID
1234 -f skaffold.yaml

Options:
      --concurrency=-1: number of artifacts to build concurrently. 0 means
"no-limit"
      --diskSizeGb=0: Disk size of the VM that runs the build
      --machineType='': Type of VM that runs the build
      --projectId='': ID of the Cloud Platform Project.
      --timeout='': Build timeout (in seconds)

Usage:
  skaffold inspect build-env modify googleCloudBuild [flags] [options]

Use "skaffold options" for a list of global command-line options (applies to all
commands).

[codecov]

Codecov Report

Merging #5935 (986c86b) into master (20e00dc) will increase coverage by 0.09%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master    #5935      +/-   ##
==========================================
+ Coverage   70.57%   70.66%   +0.09%     
==========================================
  Files         457      458       +1     
  Lines       17534    17609      +75     
==========================================
+ Hits        12374    12443      +69     
- Misses       4246     4251       +5     
- Partials      914      915       +1     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/inspect_modules.go	87.50% <0.00%> (ø)
cmd/skaffold/app/cmd/inspect_profiles.go	92.30% <0.00%> (ø)
pkg/skaffold/inspect/types.go	100.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_build_env.go	59.85% <78.78%> (+4.02%)	⬆️
pkg/skaffold/inspect/buildEnv/modify_gcb.go	81.25% <81.25%> (ø)
pkg/skaffold/inspect/errors.go	56.09% <85.18%> (+56.09%)	⬆️
cmd/skaffold/app/cmd/inspect.go	100.00% <100.00%> (ø)
pkg/skaffold/docker/image.go	79.53% <0.00%> (+1.39%)	⬆️
pkg/skaffold/inspect/buildEnv/add_gcb.go	78.72% <0.00%> (+4.25%)	⬆️

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[tejal29]

I feel, just having this command is not sufficient.
We also need to provide a way for IDEs to detect if googleCloudBuild profile exists.

$skaffold inspect build-env list googleCloudBuild
gcb-dev
gcb-prod
gcb-staging

$skaffold inspect build-env modify googleCloudBuild -p gcb.

However, we can do this in another PR

[gsquared94]

I feel, just having this command is not sufficient.
We also need to provide a way for IDEs to detect if googleCloudBuild profile exists.

$skaffold inspect build-env list googleCloudBuild
gcb-dev
gcb-prod
gcb-staging

$skaffold inspect build-env modify googleCloudBuild -p gcb.

However, we can do this in another PR

We have that in:

 skaffold inspect profiles list --build-env googleCloudBuild