Add CSV metadata minification migration

[joelanford]

Add the minify-csv-metadata migration and register it after bundle-object-to-csv-metadata. The migration rewrites existing olm.csv.metadata properties while leaving other bundle properties unchanged.

Minify CRD and API service definitions to retain only their identifying and display fields: Name, Group where applicable, Version, Kind, DisplayName, and Description. Add tests covering migration sequencing and removal of the omitted definition fields.

This follows the OLMv0 package-server implementation, which filters CRD and API service descriptions to the same fields: https://github.com/operator-framework/operator-lifecycle-manager/blob/cf27af72356d95b33c2fcb38dcff4d9ca2e7d475/pkg/package-server/apis/operators/packagemanifest.go#L28-L31

For the Red Hat 4.22 catalog, the catalog size decreases from 118,396 KiB (116M) to 47,200 KiB (47M) after migration and minification, a reduction of 71,196 KiB or approximately 60.1%.

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[codecov]

Codecov Report

❌ Patch coverage is 95.55556% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.75%. Comparing base (7465ba8) to head (8fb9ff3).

Files with missing lines	Patch %	Lines
alpha/action/migrations/001_minify_csv_metadata.go	83.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2088      +/-   ##
==========================================
+ Coverage   59.55%   59.75%   +0.19%     
==========================================
  Files          99      100       +1     
  Lines        8157     8202      +45     
==========================================
+ Hits         4858     4901      +43     
- Misses       2724     2725       +1     
- Partials      575      576       +1     

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