Basic support for overlay databases #214

Job	Run time
Upload debug artifacts after failure in analyze (nightly-latest)	1m 32s
Upload debug artifacts after failure in analyze (stable-v2.20.3)	1m 37s
Upload debug artifacts after failure in analyze (linked)	1m 27s
Upload debug artifacts after failure in analyze (default)	1m 32s
Download and check debug artifacts after failure in analyze	4s
	6m 12s

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