macOS: Simplify imported framework locations in find modules

Take advantage of commit d605f728 (macOS: Allow IMPORTED_LOCATION to
be a framework folder, 2023-06-16) to remove special-case framework
logic from find modules.

This changes link lines from `/path/to/Foo.framework/Foo[.tbd]` to
`-framework Foo`.  With the latter, the linker will automatically choose
the `.tbd` if it exists.

Issue: #24946