Add recoverable GWP-ASan.

Recoverable GWP-ASan is a mode landed upstream in
https://reviews.llvm.org/D140173. For more information about why/what it
is, see
https://android-review.git.corp.google.com/c/platform/bionic/+/2394588.

This patch makes debuggerd call the required libc callbacks for GWP-ASan
to recover from the memory corruption. It also adds the functionality
that libart/sigchain eventually ends up calling, which dumps a GWP-ASan
report for the first error encountered.

Test: Build the platform, run sanitizer-status in recoverable mode,
asserting that it doesn't crash but we get a debuggerd report.
Bug: 247012630

Change-Id: I27212f7250844c20a8fd1e961417cdb4e5bd3626