Overlay: Small code improvements #2133

Job	Run time
Upload debug artifacts after failure in analyze (linked)	3m 7s
Upload debug artifacts after failure in analyze (nightly-latest)	3m 14s
Upload debug artifacts after failure in analyze (default)	3m 32s
Upload debug artifacts after failure in analyze (stable-v2.20.3)	1m 44s
Download and check debug artifacts after failure in analyze	15s
	11m 52s

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