Configure Open MPI shmem defaults on macOS (#802) #4946

Job	Run time
ci-scope	2s
pre-commit / pre-commit	2m 15s
pre-commit / link-check	15s
mac / clang-build (Release)	3m 4s
mac / clang-build (Debug)	2m 25s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 7s
ubuntu / clang-build (ubuntu-24.04)	3m 0s
windows / msvc-build (Debug)	3m 21s
ubuntu / gcc-build (ubuntu-24.04, Release)	2m 24s
windows / clang-build	3m 21s
windows / msvc-build (Release)	6m 17s
ubuntu / gcc-test (ubuntu-24.04)	2m 48s
ubuntu / clang-test (ubuntu-24.04)	2m 36s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	3m 17s
mac / clang-test	1m 59s
windows / clang-test	1m 31s
windows / clang-test-extended	1m 27s
mac / clang-test-extended	1m 19s
ubuntu / gcc-test-extended (ubuntu-24.04)	1m 45s
ubuntu / clang-test-extended (ubuntu-24.04)	1m 49s
windows / msvc-test	2m 13s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	1m 11s
ubuntu / gcc-build-codecov	3m 56s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	1m 0s
windows / msvc-test-extended	1m 32s
perf / macos-clang-build-perf-stats	2m 4s
perf / ubuntu-gcc-build-perf-stats	1m 3s
pages / build-scoreboard	14s
pages / build-doxygen-xml	20s
pages / build-sphinx	40s
pages / deploy-pages	19s
	1h 1m 34s

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