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Fix, cleanup, and optimize new cloud provider code. #642

Job	Run time
Build (macos-latest, net7.0, true, -x64, false)	1m 29s
Build (windows-latest, net6.0, -x64, false)	7m 5s
Build (macos-latest, net6.0, -x64, false)	1m 20s
Build (windows-latest, net7.0, true, -x64, true)	6m 40s
Build (ubuntu-latest, net6.0, -x64, false)	1m 31s
Build (ubuntu-latest, net7.0, true, -x64, false)	1m 26s
Publish	0s
	19m 31s

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