[clang] [llvm] [CloneFunction][DebugInfo] Avoid cloning DILocalVariables of inlined functions (PR #75385)

[Jeremy Morse via cfe-commits]

jmorse wrote:

I've placed a re-application of this code in #119001, along with a commit that attempts to fix the matter discovered here.  To avoid multiple DICompositeTypes in multiple DISubprograms being ODRUnique'd, we instead put them in the declaration DISubprogram which should be unique'd anyway.

https://github.com/llvm/llvm-project/pull/75385