Decklink simulator integration #241

Job	Run time
build-linux (gcc-9)	5m 10s
build-linux-Qt6 (gcc-9)	6m 18s
build-macos-brew (clang-9)	4m 30s
build-macos-brew-Qt6 (clang-9)	5m 43s
build-macos-no-brew (clang-9)	13m 48s
build-macos-no-brew-Qt6 (clang-9)	12m 40s
build-windows-mingw (5.15.2)	7m 48s
build-windows-mingw-Qt6 (6.3.0, qtmultimedia qt5compat)	9m 7s
build-windows-vs (5.15.2)	8m 21s
build-windows-vs-Qt6 (6.3.0, qtmultimedia qt5compat)	12m 18s
	1h 25m 43s

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