Support shorthand forms for `getRemoteConfig` #4041

Job	Run time
Upload debug artifacts (nightly-latest)	6m 13s
Upload debug artifacts (default)	7m 12s
Upload debug artifacts (stable-v2.20.3)	6m 2s
Upload debug artifacts (linked)	5m 51s
Download and check debug artifacts	6s
	25m 24s

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