Disable Azure ML image build for now #4744

Job	Run time
Fetch product daily/preview versions	8s
Base Image Previews	7m 43s
Connect Content Init - Daily	1m 5s
Connect - Daily	10m 15s
Package Manager - Daily	6m 50s
Package Manager - Preview	6m 39s
R Session Complete - Daily	10m 31s
R Session Complete - Preview	10m 31s
Workbench - Daily	10m 45s
Workbench - Preview	10m 44s
	1h 15m 11s

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