[CMake][cxx-interop] std_span.apinotes and std_string_view.apinotes aren't installed if SWIFT_INCLUDE_APINOTES is false (#90971)
std_span.apinotes and std_string_view.apinotes aren't listed in the
swift_install_in_component(FILES ...) and so don't get installed if
SWIFT_INCLUDE_APINOTES is false. Do some cleanup of the CMake and add
them alongside std.apinotes.
rdar://151888333