Fixes #556: Move the `CompileWithWarnings.cmake` module fully into th… #540

Job	Run time
build (windows-2019, 12.1.1, Visual Studio 16 2019, powershell, windows, -A x64)	5m 55s
build (windows-2019, 12.0.1, Visual Studio 16 2019, powershell, windows, -A x64)	4m 54s
build (windows-2019, 11.8.0, Visual Studio 16 2019, powershell, windows, -A x64)	13m 50s
build (windows-2019, 11.7.0, Visual Studio 16 2019, powershell, windows, -A x64)	7m 56s
build (windows-2019, 11.6.2, Visual Studio 16 2019, powershell, windows, -A x64)	4m 49s
build (windows-2019, 11.6.1, Visual Studio 16 2019, powershell, windows, -A x64)	3m 14s
build (windows-2019, 11.6.0, Visual Studio 16 2019, powershell, windows, -A x64)	6m 8s
build (windows-2019, 11.5.0, Visual Studio 16 2019, powershell, windows, -A x64)	7m 0s
build (windows-2019, 11.4.0, Visual Studio 16 2019, powershell, windows, -A x64)	7m 2s
build (windows-2019, 11.3.0, Visual Studio 16 2019, powershell, windows, -A x64)	7m 1s
build (windows-2019, 11.2.2, Visual Studio 16 2019, powershell, windows, -A x64)	7m 0s
build (windows-2019, 11.1.1, Visual Studio 16 2019, powershell, windows, -A x64)	7m 1s
build (windows-2019, 11.0.3, Visual Studio 16 2019, powershell, windows, -A x64)	7m 33s
	1h 29m 23s

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