[chore] Split mdatagen configs in different files

[bogdandrutu]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 78.76712% with 62 lines in your changes missing coverage. Please review.

Project coverage is 91.36%. Comparing base (2418583) to head (bb6316e).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/mdatagen/internal/metadata.go	66.87%	49 Missing and 3 partials ⚠️
cmd/mdatagen/internal/metric.go	86.48%	9 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11519      +/-   ##
==========================================
- Coverage   91.38%   91.36%   -0.02%     
==========================================
  Files         433      434       +1     
  Lines       23659    23659              
==========================================
- Hits        21620    21616       -4     
- Misses       1663     1666       +3     
- Partials      376      377       +1     

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[mx-psi]

It looks like this error condition was not present on the original file, and it is making the contrib release fail. Part of the solution is #11167, but could we also have these kinds of changes listed in the PR description (and maybe changelog as well)? It was a bit hard for me to debug this (since the PR title talks about just moving files around, I discarded this PR as the cause of the error initially)

[atoulme]

I vote to reset back to the original logic, and have an issue if we want to evolve the logic.