CI: Occasional segfault during benchmarking

[maleadt]

As seen in https://buildkite.com/julialang/metal-dot-jl/builds/1537#0193ddfa-013b-49dd-8229-d4e3bf6151e5:

[ Info: Preparing main benchmarks
ERROR: Exception handler triggered on unmanaged thread.
[62318] signal 10 (1): Bus error: 10
in expression starting at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-aarch64-4.0/build/default-macmini-aarch64-4-0/julialang/metal-dot-jl/perf/runbenchmarks.jl:36
jl_gc_state_set at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-XG3Q6T6R70.0/build/default-honeycrisp-XG3Q6T6R70-0/julialang/julia-release-1-dot-11/src/./julia_threads.h:334 [inlined]
jl_gc_state_save_and_set at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-XG3Q6T6R70.0/build/default-honeycrisp-XG3Q6T6R70-0/julialang/julia-release-1-dot-11/src/./julia_threads.h:340 [inlined]
jl_delete_thread at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-XG3Q6T6R70.0/build/default-honeycrisp-XG3Q6T6R70-0/julialang/julia-release-1-dot-11/src/threading.c:512
_pthread_tsd_cleanup at /usr/lib/system/libsystem_pthread.dylib (unknown line)
_pthread_exit at /usr/lib/system/libsystem_pthread.dylib (unknown line)
_pthread_wqthread_exit at /usr/lib/system/libsystem_pthread.dylib (unknown line)
_pthread_wqthread at /usr/lib/system/libsystem_pthread.dylib (unknown line)
Allocations: 197397221 (Pool: 197391790; Big: 5431); GC: 445
ERROR: Exception handler triggered on unmanaged thread.

This is surprisingly similar to what occasionally happens in CUDA.jl, e.g., https://buildkite.com/julialang/cuda-dot-jl/builds/5611#0193da04-b534-4be5-a488-960ed5c568e2:

[ Info: Preparing main benchmarks
🚨 Error: The command was interrupted by a signal: signal: trace/breakpoint trap (core dumped)

The source looks different though:

Thread 6 "julia" received signal SIGSEGV, Segmentation fault.
[Switching to LWP 1179041]
ijl_process_events () at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/jl_uv.c:389
389	/cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/jl_uv.c: No such file or directory.
(gdb) bt
#0  ijl_process_events () at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/jl_uv.c:389
#1  0x00007ffff71d3f37 in ijl_task_get_next (trypoptask=<optimized out>, q=<optimized out>,
    checkempty=<optimized out>) at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/scheduler.c:610
#2  0x00007fffe25a9993 in julia_poptask_66344 () at task.jl:1012
#3  0x00007fffe386f313 in julia_wait_65850 () at task.jl:1021
#4  0x00007fffe30d4494 in julia_#wait#731_65869 () at condition.jl:130
#5  0x00007fff4cf399ae in ?? ()
#6  0x00007fff16d30010 in ?? ()
#7  0x389b91a0f883f464 in ?? ()
#8  0x00007fff31b83c28 in ?? ()
#9  0x00007fff16d30080 in ?? ()
#10 0x00007fff31b83cd0 in ?? ()
#11 0x00007fff31b83ad0 in ?? ()
#12 0x389b91a0f403f464 in ?? ()
#13 0x389b6b37b033f464 in ?? ()
#14 0x00007fff00000000 in ?? ()
#15 0x00007fff103c68c0 in ?? ()
#16 0x00007fff103afa70 in ?? ()
#17 0x0000000000000004 in ?? ()
#18 0x00007fff103c5c60 in ?? ()
#19 0x0000000000000008 in ?? ()
#20 0x0000000000000040 in ?? ()
#21 0x0000000000000000 in ?? ()