tests

Add breathe bridge doxygen to sphinx #1482

Job	Run time
test_indentation	24s
coverage	3m 43s
test_linux_and_macos_mpi (ubuntu-latest, Release)	2m 6s
test_linux_and_macos_mpi (macos-latest, Release)	2m 16s
linux-gdb-valgrind (ubuntu-22.04, Debug)	12m 50s
test_linux_and_macos (ubuntu-latest, Release)	1m 30s
test_linux_non_unity_no_optional_dependencies (ubuntu-latest, Debug)	3m 18s
test_linux_and_macos (ubuntu-latest, Debug)	2m 21s
test_windows (windows-2022, Release, Visual Studio 17 2022)	2m 40s
test_linux_and_macos (macos-latest, Release)	2m 27s
test_windows (windows-2022, Debug, Visual Studio 17 2022)	17m 8s
test_linux_and_macos (macos-latest, Debug)	3m 13s
test_linux_and_macos (macos-11, Release)	3m 10s
test_linux_and_macos (macos-11, Debug)	4m 16s
linux-gcc_mpi (ubuntu-20.04, Debug)	3m 4s
linux-cmake_mpi (ubuntu-latest, 2.8.12, TRUE, Release)	2m 51s
linux-cmake_mpi (ubuntu-latest, 2.8.12, FALSE, Release)	2m 31s
linux-cmake_mpi (ubuntu-latest, 3.16.x, TRUE, Release)	2m 12s
linux-cmake_mpi (ubuntu-latest, 3.16.x, FALSE, Release)	1m 48s
linux-cmake_mpi (ubuntu-latest, 3.20.x, TRUE, Release)	2m 18s
linux-cmake_mpi (ubuntu-latest, 3.20.x, FALSE, Release)	1m 46s
	1h 17m 52s

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