Support shorthand forms for `getRemoteConfig` #8280

Job	Run time
Ruby analysis (ubuntu-latest, linked)	37s
Ruby analysis (ubuntu-latest, nightly-latest)	42s
Ruby analysis (macos-latest, nightly-latest)	44s
Ruby analysis (macos-latest, linked)	49s
Ruby analysis (ubuntu-latest, default)	40s
Ruby analysis (macos-latest, default)	52s
	4m 24s

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