[clang] [SSAF] Let function parameters inherit linkage from their parent functions (PR #201946)

[Balázs Benics via cfe-commits]

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

Looks great. The tests are also great!
It was a pleasure to review this sub 200 lines PR.

https://github.com/llvm/llvm-project/pull/201946