[llvm-exegesis] Disable load store aliasing test

Test added by #159366

This is causing objdump to crash more often than not on our 2 stage
SVE bots, disabling it and I will investigate tomorrow.

Could be the changes in the PR, or a pre-existing codegen or
llvm-objdump problem.

Author: DavidSpickett

llvm/test/tools/llvm-exegesis/AArch64/no-aliasing-ld-str.s

@@ -1,4 +1,6 @@
 REQUIRES: aarch64-registered-target
+// Flakey on SVE buildbots, disabled pending invesgitation.
+UNSUPPORTED: target={{.*}}
 
 RUN: llvm-exegesis -mtriple=aarch64 -mcpu=neoverse-v2 -mode=latency --dump-object-to-disk=%d --opcode-name=FMOVWSr --benchmark-phase=assemble-measured-code 2>&1
 RUN: llvm-objdump -d %d > %t.s