[soong] Add memtag-stack sanitizer, switch to linker-generated notes.

This change depends on the following toolchain commit:
https://reviews.llvm.org/D118948

Bug: b/174878242
Test: sanitize_test.go
Test: fvp_mini with SANITIZE_TARGET=memtag_heap,memtag_stack

Change-Id: I52d2318c8e4e06d6da5b74c45226144b880f1577