[CodeQuality] Add DirnameDirConcatStringToDirectStringPathRector to set, deprecate DynamicDocBlockPropertyToNativePropertyRector

[TomasVotruba]

Two orphan rules (in no set) handled:

• DirnameDirConcatStringToDirectStringPathRector - registered into the CodeQuality set/level. Safe cosmetic rule, added at the end of the list to avoid shifting existing level indices.
• DynamicDocBlockPropertyToNativePropertyRector - deprecated. It turned a docblock @property (public by design) into a private native property, silently changing the access level and potentially breaking code relying on the public property. Body gutted to throw, tests removed.