[1.20] backport host auth and fix springboot template

[gauron99]

• backporting host auth fixes
• backporting springboot template bug
• backporting workflow cleanups

[knative-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[matejvasek]

/approve
/lgtm

[codecov]

Codecov Report

❌ Patch coverage is 47.61905% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.10%. Comparing base (c9d4c54) to head (f384372).
⚠️ Report is 1 commits behind head on release-1.20.

Files with missing lines	Patch %	Lines
cmd/client.go	8.33%	10 Missing and 1 partial ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.20    #3301      +/-   ##
================================================
+ Coverage         52.79%   60.10%   +7.30%     
================================================
  Files               134      134              
  Lines             13519    13516       -3     
================================================
+ Hits               7138     8124     +986     
+ Misses             5526     4424    -1102     
- Partials            855      968     +113     

Flag	Coverage Δ
e2e-tests	41.62% <4.76%> (+11.15%)	⬆️
integration-tests	54.67% <47.61%> (?)
unit-tests	46.72% <47.61%> (+0.01%)	⬆️

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[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gauron99, lkingland, matejvasek

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