[clang] [llvm] Tentative fix for not removing newly internal functions (PR #106146)

[Greg Roth via cfe-commits]

pow2clk wrote:

I'd like to add a test that verifies this removal of used functions that get alwaysinlined, but that requires the inlining fix for #89282 

https://github.com/llvm/llvm-project/pull/106146