Basic support for overlay databases #215

Job	Run time
Upload debug artifacts after failure in analyze (default)	1m 28s
Upload debug artifacts after failure in analyze (stable-v2.20.3)	1m 41s
Upload debug artifacts after failure in analyze (nightly-latest)	1m 52s
Upload debug artifacts after failure in analyze (linked)	1m 36s
Download and check debug artifacts after failure in analyze	4s
	6m 41s

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