Install supported compilers in workflow #2

Job	Run time
build (ubuntu-latest, Debug, gcc)	26s
build (windows-latest, Release, gcc)	42s
build (windows-latest, Debug, gcc)	40s
build (ubuntu-latest, Release, clang)	14s
build (ubuntu-latest, Release, gcc)	21s
build (windows-latest, Release, clang)	1m 3s
build (ubuntu-latest, Debug, clang)	10s
build (windows-latest, Debug, clang)	43s
	4m 19s

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