Another batch of mapping tests refactored

[mbabker]

Ref: #2708

Same logic as #2732 for this batch. Most of the changes in existing fixtures are meant to try and get them to have similar mapping definitions across mapping providers, which hopefully makes maintaining the tests simpler in the long run as one case is only needed for all 4 mapping configurations. Unfortunately, some quirks and differences in the mapping drivers themselves make this tricky in some places (and consolidating these mapping tests is starting to show that, like the loggable embeddable configs); those should be revisited at some point down the road.

The deleted files are all mapping test classes that are now merged into a single test class.

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (2ba8f94) 79.38% compared to head (957b197) 79.33%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/Mapping/ExtensionMetadataFactory.php	70.58%	5 Missing ⚠️
src/Mapping/MappedEventSubscriber.php	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2734      +/-   ##
==========================================
- Coverage   79.38%   79.33%   -0.06%     
==========================================
  Files         162      162              
  Lines        8498     8506       +8     
==========================================
+ Hits         6746     6748       +2     
- Misses       1752     1758       +6     

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[franmomu]

thanks @mbabker!