Improve global proxy tests #8535

Job	Run time
Ruby analysis (ubuntu-latest, nightly-latest)	39s
Ruby analysis (macos-latest, default)	45s
Ruby analysis (macos-latest, nightly-latest)	1m 8s
Ruby analysis (macos-latest, linked)	48s
Ruby analysis (ubuntu-latest, default)	42s
Ruby analysis (ubuntu-latest, linked)	38s
	4m 40s

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