Reland "[llvm-exegesis] Disable load store aliasing test"

This reverts commit aeed686.

The test is no longer causing llvm-objdump to crash, but we're
getting different errors from llvm-exegis, like:
```
FMOVWSr: Not all operands were initialized by the snippet generator for UMOVvi32 opcode.

FMOVWSr: Not all operands were initialized by the snippet generator for FCVTZUSWDri opcode.
```

Author: DavidSpickett

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

@@ -1,4 +1,6 @@
 REQUIRES: aarch64-registered-target
+// This will sometimes fail with "Not all operands were initialized by the snippet generator for...".
+UNSUPPORTED: target={{.*}}
 
 RUN: llvm-exegesis -mtriple=aarch64 -mcpu=neoverse-v2 -mode=latency --dump-object-to-disk=%t.obj --opcode-name=FMOVWSr --benchmark-phase=assemble-measured-code 2>&1
 RUN: llvm-objdump -d %t.obj > %t.s