[Performance] Cache classname collection on DynamicSourceLocatorProvider

[samsonasik]

Continue of PR:

• [Experiment] Rework child classes detection on DynamicSourceLocatorProvider #5735

this ensure classname collection on DynamicSourceLocatorProvider to be cached, ensure no more $sourceLocator->locateIdentifiersByType() if already cached, just call the $this->reflectionProvider->getClass($classNameCache)

On parallel process, the DynamicSourceLocatorDecorator always new instance due to Worker usage.

Before => 56 seconds

➜  rector-src git:(main) time bin/rector process --clear-cache 
 2176/2176 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%

                                                                                                                        
 [OK] Rector is done!                                                                                                   
                                                                                                                        

bin/rector process --clear-cache  381.72s user 15.69s system 703% cpu 56.459 total

After => 32 seconds.

➜  rector-src git:(cache-classname) time bin/rector process --clear-cache
 2176/2176 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%

                                                                                                                        
 [OK] Rector is done!                                                                                                   
                                                                                                                        

bin/rector process --clear-cache  221.64s user 9.05s system 716% cpu 32.190 total

[samsonasik]

@TomasVotruba Latest class-leak version seems cause error:

https://github.com/rectorphp/rector-src/actions/runs/8854029950/job/24316165596?pr=5845#step:5:1

[samsonasik]

closing for now to avoid side effect on class added side effect.