Enable Ubuntu 22.04 builds #132

Job	Run time
Ubuntu 18.04 (gcc7, 2.7)	26s
Ubuntu 22.04 (gcc11, 3.10)	9m 22s
Ubuntu 18.04 (gcc8, g++-8, /usr/bin/gcc-8, /usr/bin/g++-8, 3.6 -DPYTHON_EXECUTABLE:FILEPATH=/usr/...	27s
Ubuntu 20.04 (gcc9, 3.8)	20m 32s
Ubuntu 22.04 (clang14, clang-14, /usr/bin/clang-14, /usr/bin/clang++-14, 3.10)	10m 51s
Ubuntu 18.04 (gcc9, g++-9, /usr/bin/gcc-9, /usr/bin/g++-9, 3.6 -DPYTHON_EXECUTABLE:FILEPATH=/usr/...	29s
Ubuntu 20.04 (clang10, clang-10, /usr/bin/clang-10, /usr/bin/clang++-10, 3.8)	12m 54s
Ubuntu 18.04 (clang7, clang-7, /usr/bin/clang-7, /usr/bin/clang++-7, 3.6 -DPYTHON_EXECUTABLE:FILE...	24s
Ubuntu 18.04 (clang8, clang-8, /usr/bin/clang-8, /usr/bin/clang++-8, 3.6 -DPYTHON_EXECUTABLE:FILE...	28s
	55m 53s

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