Extract git-utils.ts #4666

Job	Run time
Upload debug artifacts (stable-v2.14.6)	4m 41s
Upload debug artifacts (stable-v2.15.5)	4m 37s
Upload debug artifacts (stable-v2.16.6)	4m 41s
Upload debug artifacts (stable-v2.17.6)	4m 44s
Upload debug artifacts (stable-v2.18.4)	5m 14s
Upload debug artifacts (default)	4m 56s
Upload debug artifacts (linked)	4m 48s
Upload debug artifacts (nightly-latest)	5m 7s
Download and check debug artifacts	8s
	38m 56s

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