Tests

Speed up `list_observation_ids()` #19795

Job	Run time
Files and formatting	5m 54s
Commits	8s
Clang-tidy (Debug)	4m 5s
Archs (gcc-9)	29m 13s
Clang-tidy (Release)	3m 50s
Archs (gcc-10)	40m 47s
Archs (clang-13)	37m 15s
Unit tests on macOS (x86, 13, 4)	54m 25s
Archs (clang-14)	45m 17s
Unit tests on macOS (arm64, 14, 3)	12m 57s
Unit tests (gcc-9, Debug)	25m 18s
Unit tests (gcc-9, Release)	15m 49s
Unit tests (gcc-10, Debug)	26m 11s
Unit tests (gcc-10, Release)	16m 23s
Unit tests (gcc-11, Debug)	25m 53s
Unit tests (gcc-11, Release)	11m 21s
Unit tests (clang-13, Release, OFF, OFF, JEMALLOC)	13m 25s
Unit tests (clang-13, Debug, OFF, OFF, normal)	13m 5s
Unit tests (clang-14, Debug, ON, OFF, JEMALLOC, 2)	33m 50s
Unit tests (clang-14, Release, 3.18.2, /work/charm_7_0_0/mpi-linux-x86_64-smp-clang, 3, ON, ON)	16m 33s
Documentation	8m 27s
Deploy documentation	0s
Release version	0s
	7h 20m 6s

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