Enable ABSL_BTREE_ENABLE_GENERATIONS and ABSL_SWISSTABLE_ENABLE_GENERATIONS with ABSL_HAVE_HWADDRESS_SANITIZER.

It will detect bugs similar to Asan.

Also updated related tests to pass with HWASAN.
They are still flaky because of nature of HWASAN algorithm,
but test can be update to avoid flakiness, which I will do
in followup patches.

PiperOrigin-RevId: 597613798
Change-Id: Ic8af36a268ca041c002eb561b946aa2d9b93996a