feat: get image digest from container logs for kaniko builder

[gsquared94]

Fixes: #8099

Description

This PR modifies kaniko builder to run with the --digest-file flag that can be used to get the image digest from the kubernetes logs instead of connecting to the image registry locally.

Testing instructions

• Stop the local docker daemon.
• Set kubernetes context to a cluster with kaniko setup. Maintainers can use the integration-tests GKE cluster.
• Run skaffold dev --cache-artifacts=false --default-repo=<your-image-registry> from the examples/kaniko project
• The image should be successfully built and pushed to the container registy, and deployed to the active kubernetes cluster.

[codecov]

Codecov Report

Merging #8264 (406686d) into main (290280e) will decrease coverage by 4.39%.
The diff coverage is 54.68%.

@@            Coverage Diff             @@
##             main    #8264      +/-   ##
==========================================
- Coverage   70.48%   66.08%   -4.40%     
==========================================
  Files         515      601      +86     
  Lines       23150    29506    +6356     
==========================================
+ Hits        16317    19500    +3183     
- Misses       5776     8544    +2768     
- Partials     1057     1462     +405     

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 405 more

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[aaron-prindle]

LGTM!