[llvm] [LLVM][OpenMP] "nowait" clause is valid for "workshare" (PR #88426)

[Krzysztof Parzyszek via llvm-commits]

kparzysz wrote:

> Sorry. It is already there in "End Workshare".

All directives that have "DIR/END DIR" format in Fortran, allow the clauses from the "END DIR" to be present in "DIR" (since there is no "END DIR" in C/C++).  Workshare is be the only one that doesn't allow it.

Not having the consistency makes it harder to handle OpenMP constructs with language-agnostic code.

https://github.com/llvm/llvm-project/pull/88426