[HWASan] Add basic stack tagging support for LAM.

Adds the basic instrumentation needed for stack tagging.

Currently does not support stack short granules or TLS stack histories,
since a different code path is followed for the callback instrumentation
we use.

We may simply wait to support these two features until we switch to
a custom calling convention.

Patch By: xiangzhangllvm, morehouse

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D102901