[llvm] [llvm][DebugInfo][test] Add LLVM tests for Objective-C property debug-info (PR #165373)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams approved this pull request.

Not familiar with Objc but having looked at the whole stack it makes sense and the test LGTM

https://github.com/llvm/llvm-project/pull/165373