[clang] [clang][fatlto] Only run sanitzer passes in prelink pipelines (PR #160213)

[Nikita Popov via cfe-commits]

nikic wrote:

I don't think we really have the infrastructure to run sanitizers post-link right now, as they're injected via pipeline callbacks, and we don't have that much control over the post-link pipeline (which usually runs in the linker, not clang).

https://github.com/llvm/llvm-project/pull/160213