Move conversion of PR diff-range paths to absolute paths #7220

Job	Run time
Ruby analysis (macos-latest, linked)	1m 8s
Ruby analysis (ubuntu-latest, nightly-latest)	51s
Ruby analysis (macos-latest, default)	1m 3s
Ruby analysis (ubuntu-latest, linked)	49s
Ruby analysis (ubuntu-latest, default)	51s
Ruby analysis (macos-latest, nightly-latest)	1m 13s
	5m 55s

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