[CodeGen] Disable ran-out-of-registers-error* tests (#120142)

Two tests are failing on the buildbot in stage2/asan with a stack
use-after-scope:
https://lab.llvm.org/buildbot/#/builders/52/builds/4533 (first failure
here; contains #119492 and
#119640)
    ...
    https://lab.llvm.org/buildbot/#/builders/52/builds/4550

This patch disables the tests for now, to allow the bots to return to
green (instead of reverting the patch series).

Author: thurstond

llvm/test/CodeGen/AMDGPU/ran-out-of-registers-error-all-regs-reserved.ll

@@ -1,3 +1,4 @@
+; UNSUPPORTED: target={{.*}}
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -vgpr-regalloc=greedy -verify-machineinstrs=0 -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -vgpr-regalloc=basic -verify-machineinstrs=0 -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -vgpr-regalloc=fast -verify-machineinstrs=0 -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error %s

llvm/test/CodeGen/AMDGPU/ran-out-of-registers-errors.ll

@@ -1,3 +1,5 @@
+; UNSUPPORTED: target={{.*}}
+;
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -stress-regalloc=1 -vgpr-regalloc=greedy -filetype=null %s 2>&1 | FileCheck -check-prefixes=CHECK,GREEDY -implicit-check-not=error %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -stress-regalloc=1 -vgpr-regalloc=basic -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error -check-prefixes=CHECK,BASIC %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -stress-regalloc=1 -vgpr-regalloc=fast -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error -check-prefixes=CHECK,FAST %s