[clang] [clang][scan-deps] Add option to disable caching stat failures (PR #144000)

[Jan Svoboda via cfe-commits]

https://github.com/jansvoboda11 approved this pull request.

LGTM. I think I would slightly prefer for `DependencyScanningWorkerFilesystem` to accept the entire service instead of its members (for the same reasons we do that in the worker, action, etc.)

https://github.com/llvm/llvm-project/pull/144000