[compiler-rt] Add API to temporalily disable usage of ASAN's fake stack (PR #160135)

[via llvm-commits]

happyCoder92 wrote:

Addressed the comments.
We switch to a MADV_DONTDUMP stack and don't want any of the local variable contents to end up in a core dump.
As fake stack is not allocated with the same flags, its usage will result in those variables ending up in the core dump.

https://github.com/llvm/llvm-project/pull/160135