Stabilize MPI test timing (#780) #4812

Job	Run time
pre-commit / pre-commit	2m 4s
pre-commit / link-check	19s
mac / clang-build (Debug)	2m 19s
ubuntu / clang-build (ubuntu-24.04)	3m 12s
mac / clang-build (Release)	3m 4s
ubuntu / gcc-build (ubuntu-24.04, Release)	2m 36s
windows / msvc-build (Release)	4m 50s
windows / msvc-build (Debug)	2m 59s
windows / clang-build	3m 8s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 3s
ubuntu / gcc-test (ubuntu-24.04)	8m 25s
mac / clang-test	4m 40s
windows / clang-test	5m 20s
ubuntu / clang-test (ubuntu-24.04)	8m 25s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	3m 54s
windows / msvc-test	4m 41s
mac / clang-test-extended	3m 4s
windows / clang-test-extended	3m 4s
windows / msvc-test-extended	3m 6s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	3m 32s
ubuntu / gcc-test-extended (ubuntu-24.04)	5m 4s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 31s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	2m 24s
ubuntu / gcc-build-codecov	7m 57s
perf / macos-clang-build-perf-stats	2m 33s
perf / ubuntu-gcc-build-perf-stats	1m 32s
pages / build-doxygen-xml	25s
pages / build-scoreboard	19s
pages / build-sphinx	41s
pages / deploy-pages	14s
	1h 40m 25s

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