Merge changes from topic "cherrypicker-L63100030007346850:N40600030118710511" into main

* changes:
  Revert "Re-land linker support for MTE globals"
  Revert "Re-land tests for MTE globals"
  Revert "Fix dlext tests for MTE globals"
  Revert "Implement deterministic MTE globals for dlext RELRO sharing"