[DeadCode] Add RemoveReturnTagIncompatibleWithNativeTypeRector

[TomasVotruba]

Adds RemoveReturnTagIncompatibleWithNativeTypeRector to the DeadCode set.

Removes a @return docblock whose type contradicts the declared native return type — the tag is dead/wrong and misleads readers and IDEs.

 final class SomeClass
 {
-    /**
-     * @return SomeObject
-     */
     public function getName(): string
     {
         return $this->someObject->getName();
     }
 }

Safe by design

Removes only a true contradiction (nativeType->isSuperTypeOf(docType)->no()). Legitimate narrowing is kept.

native	@return	action
string	\stdClass	remove
array	\stdClass	remove
object	\stdClass	keep (narrowing)
array	int[]	keep (generic narrowing)
string	\stdClass + description	keep
(no native type)	\stdClass	keep

Complements RemoveUselessReturnTagRector (equal type) and RemoveMixedDocblockOverruledByNativeTypeRector (mixed); neither covers a contradicting class/scalar @return.