[llvm] [AMDGPU] Add pal metadata 3.0 support to callable pal funcs (PR #67104)

[Carl Ritson via llvm-commits]

================
@@ -0,0 +1,290 @@
+; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx1100 -verify-machineinstrs < %s | FileCheck %s
----------------
perlfu wrote:

I take it this test cannot be autogenerated?

Would testing other metadata fields like wgp_mode require separate files, or could this be extended to cover them?

https://github.com/llvm/llvm-project/pull/67104