[WIP] Add cetl::variant #219

Job	Run time
docs	3m 38s
verification (Debug, exceptions, 14, gcc)	4m 29s
verification (Debug, exceptions, 14, clang)	4m 0s
verification (Debug, exceptions, 17, gcc)	4m 27s
verification (Debug, exceptions, 17, clang)	4m 7s
verification (Debug, exceptions, 20, gcc)	4m 25s
verification (Debug, exceptions, 20, clang)	4m 7s
verification (Debug, no-exceptions, 14, clang)	3m 3s
verification (Debug, no-exceptions, 17, gcc)	4m 5s
verification (Debug, no-exceptions, 17, clang)	3m 11s
verification (Debug, no-exceptions, 20, gcc)	3m 59s
verification (Debug, no-exceptions, 20, clang)	3m 11s
verification (Release, exceptions, 14, gcc)	4m 24s
verification (Release, exceptions, 14, clang)	4m 22s
verification (Release, exceptions, 17, gcc)	4m 23s
verification (Release, exceptions, 17, clang)	4m 24s
verification (Release, exceptions, 20, gcc)	1m 15s
verification (Release, exceptions, 20, clang)	4m 24s
verification (Release, no-exceptions, 14, gcc)	1m 7s
verification (Release, no-exceptions, 14, clang)	4m 25s
verification (Release, no-exceptions, 17, gcc)	19s
verification (Release, no-exceptions, 17, clang)	1m 11s
verification (Release, no-exceptions, 20, gcc)	20s
verification (Release, no-exceptions, 20, clang)	1m 2s
verification (Coverage, no-exceptions, 14, gcc)	4m 21s
sonarqube	0s
deploy-docs	0s
	1h 22m 39s

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