Add experimental functionality for labelling PRs by their size #1761

Job	Run time
Upload debug artifacts after failure in analyze (stable-v2.20.3)	2m 12s
Upload debug artifacts after failure in analyze (default)	3m 41s
Upload debug artifacts after failure in analyze (linked)	4m 20s
Upload debug artifacts after failure in analyze (nightly-latest)	3m 25s
Download and check debug artifacts after failure in analyze	10s
	13m 48s

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