Add GitHub Action to build Cloud Framework containers #282

Job	Run time
Timestamp	12s
Test StringEnum Trimmed	43s
Build macOS UEFS	39s
Build Windows Shim	21s
Build Windows UEFS	21s
Build macOS Pass 1	36s
Build Linux Pass 1	36s
Build Linux Shim	37s
Build Windows Pass 1	21s
Build macOS Shim	35s
Build Libraries on macOS	37s
Build and Test Libraries on Windows	22s
Build Linux Pass 2	1s
Build macOS Pass 2	1s
Build Windows Pass 2	1s
Test Schema Generation	1s
Publish UET Container	1s
Publish UET Container (with Wine)	1s
Publish UEFS Container	1s
Publish to GitHub	1s
Publish to NuGet	1s
	6m 9s

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