Add support for whole module import #381

Job	Run time
build (windows-latest, x86, static, debug, MDd)	8m 15s
build (windows-latest, x86, static, debug, MTd)	9m 15s
build (windows-latest, x86, static, release, MD)	4m 50s
build (windows-latest, x86, static, release, MT)	4m 52s
build (windows-latest, x86, shared, debug, MDd)	8m 49s
build (windows-latest, x86, shared, release, MD)	5m 37s
build (windows-latest, x64, static, debug, MDd)	9m 30s
build (windows-latest, x64, static, debug, MTd)	9m 1s
build (windows-latest, x64, static, release, MD)	4m 51s
build (windows-latest, x64, static, release, MT)	4m 58s
build (windows-latest, x64, shared, debug, MDd)	8m 29s
build (windows-latest, x64, shared, release, MD)	4m 51s
	1h 23m 18s

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