Revert^4 "Disable write-barrier elimination pass"

This reverts commit b5b98b9bb31acb2deffb692c50d0fbc71476663b.

Reason for revert: Breaks tests in arm64 + heap poison configurations

Bug: 310755375
Bug: 260843353
Change-Id: I682c74987a365497e0dbe47eba26a9ccf0513561
30 files changed