feat: helm dependency build on render

[dsiebel]

Fixes: #5445

Description

Fixes the issue described in #5445, where running skaffold render on a Helm Chart with dependencies results in an error, because the Chart dependencies are not being updated:

ERRO[0000] Error: An error occurred while checking for chart dependencies. You may need to run `helm dependency build` to fetch missing dependencies: found in Chart.yaml, but missing in charts/ directory: app
exit status 1  subtask=0 task=Render
std out err: %!(EXTRA *errors.errorString=Error: An error occurred while checking for chart dependencies. You may need to run `helm dependency build` to fetch missing dependencies: found in Chart.yaml, but missing in charts/ directory: app
exit status 1
)

helm dep build has been implemented on skaffold run|deploy which is where this implementation was copied from.

The dep build step can be skipped by setting skipBuildDependencies: true on the corresponding helm.release, analogous to the implementation on skaffold deploy.

Unit tests have been adjusted to the best of my knowledge, happy about any further suggestions there.

User facing changes (remove if N/A)

Before: Running skaffold render on a Helm chart with dependencies results in an error on the underlying helm template.

After: Running skaffold render updates the Helm Charts' dependencies and renders them successfully.

Alternatives considered

Initially I was thinking about using the --dependency-update flag on helm template, but this one was only implemented recently and I couldn't figure out how to easily evaluate the helm binary version in renderer.helm.
The current implementation should be the safer path, since it properly honors the Chart.lock file (or creates it if missing).

[codecov]

Codecov Report

Merging #8486 (084c4d8) into main (290280e) will decrease coverage by 5.29%.
The diff coverage is 55.02%.

@@            Coverage Diff             @@
##             main    #8486      +/-   ##
==========================================
- Coverage   70.48%   65.19%   -5.29%     
==========================================
  Files         515      602      +87     
  Lines       23150    29917    +6767     
==========================================
+ Hits        16317    19505    +3188     
- Misses       5776     8940    +3164     
- Partials     1057     1472     +415     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/completion.go	13.04% <0.00%> (-1.25%)	⬇️
cmd/skaffold/app/cmd/config/list.go	65.21% <ø> (ø)
cmd/skaffold/app/cmd/config/set.go	88.72% <ø> (ø)
cmd/skaffold/app/cmd/config/util.go	54.28% <ø> (ø)
cmd/skaffold/app/cmd/credits.go	100.00% <ø> (ø)
cmd/skaffold/app/cmd/credits/export.go	0.00% <0.00%> (ø)
cmd/skaffold/app/cmd/deploy.go	40.90% <0.00%> (-12.94%)	⬇️
cmd/skaffold/app/cmd/generate_pipeline.go	60.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_modules.go	65.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_profiles.go	66.66% <ø> (ø)
... and 425 more

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[aaron-prindle]

Sorry for the delay, thanks for the PR here @dsiebel! This PR looks good, the lint test error is unrelated to the changes here. Merging this now, it will be available in our next release - v2.4.0