[clang] [Driver] Disable sanitizer ignorelists on Darwin (PR #195690)

[Andrew Haberlandt via cfe-commits]

ndrewh wrote:

> Also what kind of issue you get from emoty or missing ignore list file? addDefaultIgnorelists suppose to do nothing.

Yes, It is _supposed_ to do nothing, but the swiftlang dependency scanner does not treat the files correctly (https://github.com/swiftlang/swift/blob/main/lib/DependencyScan/ModuleDependencyScanner.cpp#L476) when setting up it's virtualized filesystem.

I would just go and fix that, but we need this code to behave the same with and without a compiler-rt build, so I first wanted to move the ignorelists into clang (which imo is the right place for them anyway).

https://github.com/llvm/llvm-project/pull/195690