Add some missing namespace documentation #19545

Job	Run time
Commits	8s
Unit tests (gcc-9, Debug)	2h 50m 11s
Files and formatting	6m 30s
Unit tests (gcc-9, Release)	4h 8m 27s
Archs (gcc-9)	27m 11s
Clang-tidy (Debug)	16m 56s
Unit tests (gcc-10, Debug)	3h 4m 49s
Archs (gcc-10)	37m 34s
Clang-tidy (Release)	15m 53s
Unit tests (gcc-10, Release)	4h 30m 9s
Archs (clang-13)	37m 5s
Unit tests on macOS (x86, 13, 4)	3h 51m 12s
Unit tests (gcc-11, Debug)	3h 0m 9s
Archs (clang-14)	44m 26s
Unit tests on macOS (arm64, 14, 3)	2h 16m 22s
Unit tests (gcc-11, Release)	2h 27m 16s
Unit tests (clang-13, Release, OFF, OFF, JEMALLOC)	4h 32m 36s
Unit tests (clang-13, Debug, OFF, OFF, normal)	2h 53m 53s
Unit tests (clang-14, Debug, ON, OFF, JEMALLOC, 2)	2h 55m 26s
Unit tests (clang-14, Release, 3.18.2, /work/charm_7_0_0/mpi-linux-x86_64-smp-clang, 3, ON, ON)	4h 36m 48s
Documentation	43m 59s
Deploy documentation	0s
Release version	0s
	1d 20h 57m 0s

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