[clang] [ObjC] Emit number, array, and dictionary literals as constants (PR #185130)

[Nico Weber via cfe-commits]

nico wrote:

Thanks for the explanation, that makes sense.

Maybe adding a warning when `NSNumber isEqualToValue` is used with a suggestion to use isEqualToNumber might be a good idea to bundle with this change?

https://github.com/llvm/llvm-project/pull/185130