Support shorthand forms for `getRemoteConfig` #3939

Job	Run time
Upload debug artifacts (default)	6m 10s
Upload debug artifacts (nightly-latest)	5m 49s
Upload debug artifacts (linked)	5m 54s
Upload debug artifacts (stable-v2.20.3)	6m 52s
Download and check debug artifacts	27s
	25m 12s

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