[flang] [llvm] [Flang][OpenMP] Add semantic checks for order clause (PR #115281)

[Thirumalai Shaktivel via llvm-commits]

Thirumalai-Shaktivel wrote:

Yes, regarding that, I was wondering, how to get the details of the region?
There is another restriction in Order clause which say:
```
A region that corresponds to a construct with an order clause that specifies concurrent may
not contain calls to procedures that contain OpenMP directives.
```

If we get the answer for this, your example would have the similar fix.

https://github.com/llvm/llvm-project/pull/115281