[clang] [clang] Stop adjusting the module cache path (PR #102540)

[Jan Svoboda via cfe-commits]

jansvoboda11 wrote:

> > This enables more efficient implementation of the caching VFS in #88800.
> 
> Thanks @jansvoboda11 for working on this, I appreciate. One question, what do you mean by "more efficient"?

Sorry, I should've clarified. I think that without this patch, #88800 would need to apply `llvm::sys::path::native()` and `llvm::sys::fs::make_absolute()` on `DependencyScanningWorkerFilesystem::BypassedPathPrefix` within each invocation to `DependencyScanningWorkerFilesystem::shouldBypass()` where simple string prefix did not match. Only then would it recognize the modules cache path in all its forms.

https://github.com/llvm/llvm-project/pull/102540