`@no_type_check` is not respected for string annotations

For some reason, the logic implemented in #15215 failed to suppress this (playground):

import typing

@typing.no_type_check
def f(arg: "'A' or ''") -> None: ...
#            ^ F821

According to println!(), when checking the nested expression, the semantic model is in neither NO_TYPE_CHECK nor STRING_TYPE_DEFINITION context.