Get rid of warnings in "Change Type" quickfixes
Cleanup in "type mismatch" tests
ChangeFunctionParameterTypeFix for TYPE_MISMATCH error
ChangeFunctionLiteralReturnTypeFix for EXPECTED/ASSIGNMENT_TYPE_MISMATCH errors
Enable intention actions factories to return multiple quickfixes
Make ChangeFunctionReturnTypeFix handle function literals
Single factory for TYPE_MISMATCH error