[v3] Add proto for render error code and suggestions.

[yuwenma]

Fixes: #nnn
Related: #5673
Merge after: #5942

TO reviewers:
This is diff-based from #5942. Please only review the last commit

[codecov]

Codecov Report

Merging #5953 (4c20c99) into master (4bd76de) will increase coverage by 0.01%.
The diff coverage is 67.64%.

@@            Coverage Diff             @@
##           master    #5953      +/-   ##
==========================================
+ Coverage   70.69%   70.71%   +0.01%     
==========================================
  Files         459      462       +3     
  Lines       17585    17832     +247     
==========================================
+ Hits        12432    12610     +178     
- Misses       4234     4291      +57     
- Partials      919      931      +12     

Impacted Files	Coverage Δ
pkg/skaffold/render/renderer/renderer.go	62.16% <47.61%> (+11.28%)	⬆️
pkg/skaffold/render/validate/validate.go	100.00% <100.00%> (ø)
cmd/skaffold/app/cmd/inspect_profiles.go	63.15% <0.00%> (-29.15%)	⬇️
cmd/skaffold/app/cmd/inspect_modules.go	62.50% <0.00%> (-25.00%)	⬇️
pkg/skaffold/kubernetes/image_list.go	76.92% <0.00%> (-23.08%)	⬇️
pkg/skaffold/kubernetes/colorpicker.go	80.00% <0.00%> (-20.00%)	⬇️
pkg/skaffold/inspect/modules/list.go	83.33% <0.00%> (-16.67%)	⬇️
pkg/skaffold/deploy/deploy_mux.go	75.67% <0.00%> (-9.18%)	⬇️
pkg/skaffold/inspect/buildEnv/add_gcb.go	71.92% <0.00%> (-6.80%)	⬇️
pkg/skaffold/kubernetes/logger/log.go	37.50% <0.00%> (-4.56%)	⬇️
... and 30 more

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[tejal29]

fix nit and then submit!!

[tejal29]

Please change all references to Whitelist to allowlist