Revert "[openmp] Add addrspacecast to getOrCreateIdent"

This reverts commit 1a761e5b7b50dc08e0ff7f7aea65e1da29c5cd80.
Failed CI, albeit with a different failure mode to BZ51982

GitOrigin-RevId: 80fa43fe9ab41e4e035547ab0f1955efa81de3a2
1 file changed