[Diffs] Handle --no-diffs usage to show file have been changed if any with --dry-run + --no-diffs

[samsonasik]

Fixes rectorphp/rector#9487

@indykoning @TomasVotruba this should can cover rectorphp/rector#9487

this may need verification for counting increment for parallel process tho :)

[samsonasik]

It seems cause invalid result on end to end test, I will check more :)

[samsonasik]

All checks have passed 🎉 I will add e2e test for it :)

[samsonasik]

I've added e2e test for it, it shows files changed without show the diff on --no-diffs, on verify locally, it shows 2 status:

➜  rector-src git:(handle-no-diffs) ✗ bin/rector process src/ChangesReporting/Output/ConsoleOutputFormatter.php --no-diffs --dry-run
 1/1 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%                                                                                                                        
 [OK] 1 file would have been changed (dry-run) by Rector                                                                
                                                                                                                        
 ➜  rector-src git:(handle-no-diffs) ✗ echo $?
2

which 2 is ExitCode::CHANGED_CODE 👍

[samsonasik]

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

[TomasVotruba]

Thank you 😇

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