This reverts commit 04b87e15e4.
The reasons for reverting is that the following:
1. I still need need to upstream some part of the do concurrent to
OpenMP pass from our downstream implementation and taking this in
downstream will make things more difficult.
2. I still need to work on a solution for modeling locality specifiers
on `hlfir.do_concurrent` ops. I would prefer to do that and merge the
entire stack together instead of having a partial solution.
After merging the revert I will reopen the origianl PR and keep it
updated against main until I finish the above.
30990c09c9