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Use `setup-codeql` logic for finding release assets in `start-proxy` #9359

Job	Run time
Ruby analysis (macos-latest, linked)	1m 20s
Ruby analysis (ubuntu-latest, linked)	46s
Ruby analysis (macos-latest, default)	1m 15s
Ruby analysis (macos-latest, nightly-latest)	1m 10s
Ruby analysis (ubuntu-latest, default)	42s
Ruby analysis (ubuntu-latest, nightly-latest)	42s
	5m 55s