[HOT FIX] Stabilize macOS CI tests: OpenMP linking, MPI env, per-test… #4247

Job	Run time
pre-commit / pre-commit	1m 25s
ubuntu / gcc-build (ubuntu-24.04-arm, Debug)	2m 1s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 12s
ubuntu / clang-build (ubuntu-24.04)	2m 39s
ubuntu / gcc-build (ubuntu-24.04-arm, Release)	2m 0s
ubuntu / gcc-build (ubuntu-24.04, Release)	2m 31s
ubuntu / clang-build (ubuntu-24.04-arm)	2m 4s
mac / clang-build (Debug)	2m 49s
windows / msvc-build (Debug)	3m 17s
windows / clang-build	4m 36s
windows / msvc-build (Release)	4m 56s
mac / clang-build (Release)	3m 6s
ubuntu / gcc-test (ubuntu-24.04-arm)	8m 28s
ubuntu / gcc-test (ubuntu-24.04)	8m 25s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	3m 14s
ubuntu / clang-test (ubuntu-24.04-arm)	8m 14s
ubuntu / clang-test (ubuntu-24.04)	8m 26s
mac / clang-test	5m 12s
windows / clang-test	3m 17s
windows / msvc-test	5m 15s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	2m 58s
windows / clang-test-extended	3m 50s
mac / clang-test-extended	2m 57s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	2m 24s
windows / msvc-test-extended	3m 32s
ubuntu / gcc-test-extended (ubuntu-24.04-arm)	4m 37s
ubuntu / gcc-test-extended (ubuntu-24.04)	4m 32s
ubuntu / clang-test-extended (ubuntu-24.04-arm)	4m 39s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 38s
ubuntu / gcc-build-codecov	7m 52s
perf / ubuntu-gcc-build-perf-stats	1m 29s
perf / macos-clang-build-perf-stats	1m 44s
pages / build-doxygen-xml	32s
pages / build-scoreboard	23s
pages / build-sphinx	51s
pages / deploy-pages	14s
	2h 11m 19s

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