[Configuration] Make --only to force clear cache to ensure next normal run start from fresh state

[samsonasik]

Fixes rectorphp/rector#9485

[samsonasik]

implemented 👍 /cc @ghbob

[samsonasik]

All checks have passed 🎉 @TomasVotruba it is ready for review.

[samsonasik]

It seems not really clear cache, next normal run still on cache:

➜  rector-src git:(clear-cache-on-only) bin/rector process src/Application/ApplicationFileProcessor.php --only="CombinedAssignRector"
 1/1 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%
 [OK] Rector is done!                                                                                                   
                                                                                                                       
➜  rector-src git:(clear-cache-on-only) bin/rector process src/Application/ApplicationFileProcessor.php                              
                                                                                                                  
 [OK] Rector is done!                                                                                                                                                                                                                     

I will look more ..

[samsonasik]

Okay, clearing cache should on the last

[samsonasik]

Closing for now, as it may require "flag" previous run is with --only in cache