[ApplicationFileProcessor] Refactor ApplicationFileProcessor to filter file paths early before run both parallel and non-parallel

[samsonasik]

Ref #4513 (comment)

@TomasVotruba @staabm this filter file paths by supported file extensions early before process parallel or non-parallel so file counts will correctly counted, this revert the progress bar tweak on PR:

• [DX] Show progress bar 100% on RectorConsoleOutputFormatter::report() #4516

as the file now counted correctly on parallel.

We may need to centralize the process between parallel and non-parallel file process to avoid copy paste code if there is needed change, but that's will need separate PR :)

[samsonasik]

All checks have passed 🎉 @TomasVotruba I am merging it ;)

[samsonasik]

@TomasVotruba @staabm it works 🎉 , tested in CodeIgniter 4 project:

Before, show 790 files counted

➜  CodeIgniter4 git:(develop) ✗ vendor/bin/rector process --clear-cache
 790/790 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%

                                                                                                                        
 [OK] Rector is done!                                                                                                                                                                                                                    

After, show 783 files counted which the correct files that filtered by file extensions config.

➜  CodeIgniter4 git:(develop) ✗ vendor/bin/rector process --clear-cache
 783/783 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%

                                                                                                                        
 [OK] Rector is done!                                                                                     

so the progress bar is also 100% without tweaking finish :)