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Test the runner images in a dedicated `runner-images` PR check #9765

Job	Run time
Ruby analysis (ubuntu-26.04, default)	31s
Ruby analysis (macos-26, linked)	1m 12s
Ruby analysis (ubuntu-26.04, nightly-latest)	30s
Ruby analysis (ubuntu-26.04, linked)	29s
Ruby analysis (macos-26, default)	1m 4s
Ruby analysis (macos-26, nightly-latest)	59s
	4m 45s