Support shorthand forms for `getRemoteConfig` #8244

Job	Run time
Ruby analysis (ubuntu-latest, linked)	39s
Ruby analysis (macos-latest, linked)	1m 6s
Ruby analysis (ubuntu-latest, default)	36s
Ruby analysis (macos-latest, default)	1m 13s
Ruby analysis (ubuntu-latest, nightly-latest)	41s
Ruby analysis (macos-latest, nightly-latest)	41s
	4m 56s

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