swift

3502e07b - [Mangling] Add a new mangling for opaque return type to use when mangling an ObjC runtime name (#33035)

[Mangling] Add a new mangling for opaque return type to use when mangling an ObjC runtime name (#33035) * [Mangling] Add a new mangling to represent opaque return type for ObjC runtime name * [Docs] Add the new 'Qu' mangling to 'Mangling.rst' document * [Test] Update test invocation arguments