[libc++] Disable test which timeouts on ARM with sanitizers

Introduced with cf0f6a14 (#70020).

https://lab.llvm.org/buildbot/#/builders/237/builds/5145
https://lab.llvm.org/buildbot/#/builders/236/builds/7004
https://lab.llvm.org/buildbot/#/builders/239/builds/4269

Sometimes it passes with Asan but it's extemly slow

```
Slowest Tests:
1388.61s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_assignment.pass.cpp
309.42s:  llvm-libc++-shared.cfg.in :: std/containers/sequences/deque/deque.modifiers/insert_size_value.pass.cpp
```