fix: print output from post render hook in console when withChange: false

[renzodavid9]

Fixes: #9262

Description

• This PR sends stdout to the post-render hooks, when withChange: false, so user can print content from their associated script and see it in console

• From

  skaffold/cmd/skaffold/app/cmd/cmd.go

  Line 94 in 5904a97

  if err := setUpLogs(errOut, v, timestamps); err != nil {

  the logger is configured to use stderr, so we can get the writer from it to print the content

• Decided to get the writer from the logger instead of calling os.Stderr directly so we share the same behaviour in case the logger changes, e.g., printing to a document (that's something that can not do today)

• Changed back the Starting post-render hooks..., etc, messages to use output.Default.Fprintln so we print the ERRO label

Follow-up Work

• A good idea might be to send both, stdout and stderr to the post-render hooks when withChange: true so users can print info content + the rendered manifests

[codecov]

Codecov Report

Attention: 295 lines in your changes are missing coverage. Please review.

Comparison is base (290280e) 70.48% compared to head (5131626) 63.64%.
Report is 1094 commits behind head on main.

Files	Patch %	Lines
cmd/skaffold/app/cmd/exec.go	16.32%	40 Missing and 1 partial ⚠️
cmd/skaffold/app/cmd/filter.go	47.27%	22 Missing and 7 partials ⚠️
cmd/skaffold/app/cmd/lsp.go	28.12%	23 Missing ⚠️
cmd/skaffold/app/cmd/verify.go	23.33%	23 Missing ⚠️
cmd/skaffold/app/cmd/fix.go	51.16%	17 Missing and 4 partials ⚠️
cmd/skaffold/app/cmd/inspect_job_manifest_paths.go	60.00%	15 Missing and 1 partial ⚠️
cmd/skaffold/app/cmd/inspect_namespaces.go	50.00%	13 Missing and 1 partial ⚠️
...md/skaffold/app/cmd/inspect_config_dependencies.go	45.83%	12 Missing and 1 partial ⚠️
cmd/skaffold/app/cmd/lint.go	42.85%	12 Missing ⚠️
cmd/skaffold/app/cmd/inspect_build_env.go	60.71%	11 Missing ⚠️
... and 21 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9258      +/-   ##
==========================================
- Coverage   70.48%   63.64%   -6.85%     
==========================================
  Files         515      632     +117     
  Lines       23150    32607    +9457     
==========================================
+ Hits        16317    20752    +4435     
- Misses       5776    10258    +4482     
- Partials     1057     1597     +540     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.