Replace deprecated defaultIndexMethod usage with a compiler pass

[HypeMC]

Summary 📝

Symfony 8.1 deprecates the defaultIndexMethod option of tagged_locator() in favor of the #[AsTaggedItem] attribute. That attribute is not a viable replacement here, the locator index comes from the public static for() method on TargetResolverInterface and ValuesResolverInterface.

A new ResolveTaggedLocatorIndexPass calls for() itself during compilation and stamps the result onto each purgatory.target_resolver and purgatory.route_param_value_resolver tag as a for attribute, which the tagged_locator() calls now use via indexAttribute: 'for'.

Checklist ✅

• Tests updated 🐛
• Docs updated 📚
• Changelog updated 📋
• Breaking change ⚠️

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.44%. Comparing base (39eaa59) to head (90846c2).

Additional details and impacted files

@@             Coverage Diff              @@
##                1.x     #152      +/-   ##
============================================
+ Coverage     97.40%   97.44%   +0.03%     
- Complexity      499      508       +9     
============================================
  Files            62       63       +1     
  Lines          1388     1409      +21     
============================================
+ Hits           1352     1373      +21     
  Misses           36       36              

Flag	Coverage Δ
8.1	97.44% <100.00%> (+0.03%)	⬆️
8.2	97.37% <100.00%> (+0.03%)	⬆️
8.3	97.15% <100.00%> (+0.04%)	⬆️
8.4	97.15% <100.00%> (+0.04%)	⬆️
8.5	97.15% <100.00%> (+0.04%)	⬆️

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