Cleanup bionic tests with hwasan.

The tests were patched earlier to run with tagging heap allocator.
This change enables hwasan code instrumentation in the tests themselves,
and fixes the issues that arise, mainly in the code that:
* compares addresses of unrelated stack variables
* compares address of a stack variable with stack limits as found in
  /proc/self/maps
* writes address of a stack variable to a hardware watchpoint register
etc.

Note that static tests are broken at the moment, like all static
binaries. Dynamic tests pass 100% with this change.

Bug: 114279110, 124007027
Test: SANITIZE_TARGET=hwaddress; run dynamic bionic tests

Change-Id: I68b8df9dd3e30b47734ddc083811a75a7f27deaa