[cmd/mdatagen] Implement numeric validation in generated Go config code (#14806)

[blami]

Implements support for the JSON Schema numeric validation keywords 'minimum', 'maximum', 'exclusiveMaximum' and 'exclusiveMinimum' in mdatagen config generation pipeline.

Fixes #14806

• Added unit tests in generation_test.go
• The samplescraper golden file (generated_config.go) is updated to reflect the new generated output.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: blami / name: Ondrej Balaz (ce877be)

[blami]

I wonder if this should also cover multipleOf as none of the other subtasks of #14809 lists it and numeric this one seems to be logical place. Let me know if I should add it.

[dmitryax]

I don't think we have an existing use case for multipleOf at this point. So that can wait until required

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.27%. Comparing base (82b7309) to head (ab7dd7a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15270      +/-   ##
==========================================
- Coverage   91.27%   91.27%   -0.01%     
==========================================
  Files         709      709              
  Lines       46203    46218      +15     
==========================================
+ Hits        42171    42184      +13     
- Misses       2817     2818       +1     
- Partials     1215     1216       +1     

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[blami]

Thank you for approval @dmitryax , I fixed the linter issues (I forgot to run make fmt), should be clean now. As for govulncheck failure I believe that's related to stdlib CVEs fixed in go 1.26.3 and should be clean once build switched to that version.

[dmitryax]

@blami please rebase and fix the CI failures

[blami]

@dmitryax done, can you re-run the CI? Also if there's a better way to ensure all is clean locally before pushing than just making sure there are no errors in make (as per CONTRIBUTING.md) I'd like to know.

[blami]

@dmitryax Can you help me to start the CI workflows? Thanks.

[otelbot]

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