getFileDiffsWithBasehead(): use CODE_SCANNING_REPOSITORY if present #6690

Job	Run time
Multi-language repository (macos-latest, stable-v2.15.5)	7m 13s
Multi-language repository (macos-latest, stable-v2.18.4)	10m 18s
Multi-language repository (ubuntu-latest, stable-v2.16.6)	3m 55s
Multi-language repository (macos-latest, stable-v2.19.4)	10m 20s
Multi-language repository (macos-latest, linked)	8m 13s
Multi-language repository (macos-latest, stable-v2.16.6)	9m 4s
Multi-language repository (ubuntu-latest, nightly-latest)	4m 13s
Multi-language repository (ubuntu-latest, stable-v2.15.5)	3m 46s
Multi-language repository (macos-latest, nightly-latest)	8m 19s
Multi-language repository (macos-latest, default)	13m 11s
Multi-language repository (ubuntu-latest, stable-v2.19.4)	4m 8s
Multi-language repository (ubuntu-latest, stable-v2.18.4)	4m 5s
Multi-language repository (ubuntu-latest, stable-v2.17.6)	3m 55s
Multi-language repository (ubuntu-latest, default)	3m 58s
Multi-language repository (ubuntu-latest, linked)	3m 42s
Multi-language repository (macos-latest, stable-v2.17.6)	11m 3s
	1h 49m 23s

Provide feedback