[compiler-rt] [asan][test] Attempt to fix suppressions-alloc-dealloc-mismatch.cpp on Darwin (PR #124987)

[Ben Langmuir via llvm-commits]

benlangmuir wrote:

It looks like this fixed Windows, but not Darwin
https://green.lab.llvm.org/job/llvm.org/job/clang-stage1-cmake-RA-expensive/3251/

The new failure looks like the suppression mechanism is failing in the -O3 case

```
error: CHECK-IGNORE: expected string not found in input
// CHECK-IGNORE: strlen ignored
                 ^
<stdin>:1:1: note: scanning from here
=================================================================
^
<stdin>:2:28: note: possible intended match here
==78843==ERROR: AddressSanitizer: alloc-dealloc-mismatch (malloc vs operator delete) on 0x602000000070
                           ^
```

https://github.com/llvm/llvm-project/pull/124987