Add Alpine image with FIPS inside

[lucacome]

Proposed changes

Adds a new image with FIPS module and necessary configuration. The nginx-plus-module-fips-check was added to the base images. This lightweight module adds a line to the nginx output log printing whether FIPS mode is enabled or not.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues found.

Scanned Manifest Files

[codecov]

Codecov Report

Merging #4031 (df760a9) into main (0f8992d) will decrease coverage by 0.03%.
The diff coverage is n/a.

❗ Current head df760a9 differs from pull request most recent head 8bf59f6. Consider uploading reports for the commit 8bf59f6 to get more accurate results

@@            Coverage Diff             @@
##             main    #4031      +/-   ##
==========================================
- Coverage   51.85%   51.83%   -0.03%     
==========================================
  Files          59       59              
  Lines       16705    16705              
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- Hits         8663     8659       -4     
- Misses       7745     7747       +2     
- Partials      297      299       +2     

see 1 file with indirect coverage changes

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[vepatel]

I think we should add a test-run job for alpine-plus-fips image as well, maybe something like {\"image\": \"alpine-plus-fips\", \"marker\":\"policies\"}, \ in our setup-matrix.

Update: tests on this image should only run in a FIPS compliant clusters