Merge 2 rules that handle param type adding

[TomasVotruba]

• https://github.com/rectorphp/rector/blob/master/src/Rector/Typehint/ParentTypehintedArgumentRector.php
• https://github.com/rectorphp/rector/blob/master/packages/TypeDeclaration/src/Rector/ClassMethod/AddParamTypeDeclarationRector.php