chore: remove package-versions-deprecated dependency

[reydajp]

Summary

Remove the abandoned composer/package-versions-deprecated dependency.

GraphQLite only used PackageVersions\Versions to derive a cache namespace from the installed package version. This PR replaces that usage with Composer 2's built-in Composer\InstalledVersions.

Changes

• Replace PackageVersions\Versions with Composer\InstalledVersions
• Add composer-runtime-api requirement
• Remove composer/package-versions-deprecated
• Remove the related Composer plugin allow-list entry

Tests

• composer validate --strict
• git diff --check
• composer audit --abandoned=fail
• composer cs-check
• vendor/bin/phpstan analyse -c phpstan.neon --no-progress src/SchemaFactory.php src/Utils/NamespacedCache.php
• vendor/bin/phpunit --no-coverage tests/Utils/NamespacedCacheTest.php tests/SchemaFactoryTest.php

[oojacoboo]

@reydajp thanks for the PR. You'll need to rebase off master which fixes the CI issues.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.84%. Comparing base (53f9d49) to head (2848ad1).
⚠️ Report is 156 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #810      +/-   ##
============================================
- Coverage     95.72%   94.84%   -0.88%     
- Complexity     1773     1893     +120     
============================================
  Files           154      176      +22     
  Lines          4586     4987     +401     
============================================
+ Hits           4390     4730     +340     
- Misses          196      257      +61     

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[reydajp]

@reydajp thanks for the PR. You'll need to rebase off master which fixes the CI issues

Rebased onto latest master and pushed.