[ECS] Allow NoExtraBlankLinesFixer in PSR-12
[ECS] Allow NoExtraBlankLinesFixer in PSR-12

Allow NoExtraBlankLinesFixer to be used in PSR-12.

Related to #1138
Symplify/Symplify,Symplify/Symplify,Symplify/Symplify,Symplify/Symplify