[llvm-branch-commits] [flang] [flang][OpenMP] Make all block constructs share the same structure (PR #150956)

[Krzysztof Parzyszek via llvm-branch-commits]

kparzysz wrote:

PR stack:
- https://github.com/llvm/llvm-project/pull/150768
- https://github.com/llvm/llvm-project/pull/150804
- https://github.com/llvm/llvm-project/pull/150955
- https://github.com/llvm/llvm-project/pull/150956 (this PR)

https://github.com/llvm/llvm-project/pull/150956