Improve and fix CI workflows for CS checks, code coverage enabling, etc

[oojacoboo]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 120 lines in your changes are missing coverage. Please review.

Comparison is base (53f9d49) 95.72% compared to head (88b5bd7) 95.32%.
Report is 64 commits behind head on master.

Files	Patch %	Lines
src/InputFieldDescriptor.php	44.82%	16 Missing ⚠️
src/FieldsBuilder.php	92.22%	15 Missing ⚠️
src/Http/Psr15GraphQLMiddlewareBuilder.php	50.00%	9 Missing ⚠️
src/InputField.php	52.63%	9 Missing ⚠️
src/Mappers/Root/EnumTypeMapper.php	66.66%	8 Missing ⚠️
src/Middlewares/MagicPropertyResolver.php	57.14%	6 Missing ⚠️
...Middlewares/SourceConstructorParameterResolver.php	45.45%	6 Missing ⚠️
src/Middlewares/SourceInputPropertyResolver.php	40.00%	6 Missing ⚠️
...ersistedQuery/PersistedQueryIdInvalidException.php	33.33%	6 Missing ⚠️
...PersistedQuery/PersistedQueryNotFoundException.php	33.33%	6 Missing ⚠️
... and 14 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #655      +/-   ##
============================================
- Coverage     95.72%   95.32%   -0.40%     
- Complexity     1773     1815      +42     
============================================
  Files           154      171      +17     
  Lines          4586     4839     +253     
============================================
+ Hits           4390     4613     +223     
- Misses          196      226      +30     

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