Add support for SHA-256 Git object IDs #3611

Job	Run time
Upload debug artifacts (default)	6m 24s
Upload debug artifacts (nightly-latest)	5m 35s
Upload debug artifacts (linked)	5m 50s
Upload debug artifacts (stable-v2.20.3)	6m 2s
Download and check debug artifacts	6s
	23m 57s

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