This test was failing on chromium builds with error:
```
/Volumes/Work/s/w/ir/x/w/llvm_build/bin/llc -o - /Volumes/Work/s/w/ir/x/w/llvm-llvm-project/llvm/test/DebugInfo/AArch64/instr-ref-target-hooks-sp-clobber.mir -run-pass=livedebugvalues | /Volumes/Work/s/w/ir/x/w/llvm_build/bin/FileCheck /Volumes/Work/s/w/ir/x/w/llvm-llvm-project/llvm/test/DebugInfo/AArch64/instr-ref-target-hooks-sp-clobber.mir # RUN: at line 8
+ /Volumes/Work/s/w/ir/x/w/llvm_build/bin/llc -o - /Volumes/Work/s/w/ir/x/w/llvm-llvm-project/llvm/test/DebugInfo/AArch64/instr-ref-target-hooks-sp-clobber.mir -run-pass=livedebugvalues
+ /Volumes/Work/s/w/ir/x/w/llvm_build/bin/FileCheck /Volumes/Work/s/w/ir/x/w/llvm-llvm-project/llvm/test/DebugInfo/AArch64/instr-ref-target-hooks-sp-clobber.mir
error: YAML:121:3: unknown key 'stackSizePPR'
stackSizePPR: 0
^~~~~~~~~~~~
FileCheck error: '<stdin>' is empty.
FileCheck command line: /Volumes/Work/s/w/ir/x/w/llvm_build/bin/FileCheck /Volumes/Work/s/w/ir/x/w/llvm-llvm-project/llvm/test/DebugInfo/AArch64/instr-ref-target-hooks-sp-clobber.mir
```
This is an attempt to reland the failing test
0dd3cb55e2