[flang-commits] [flang] [flang][OpenMP] Fix copyprivate semantic checks (PR #95799)

[Leandro Lupori via flang-commits]

luporl wrote:

The copyprivate checks should behave correctly now, in all cases that I'm aware of.
Some symbols that represent variables with shared DSA were missing too. These were added, which required the update of some tests. I also did a slight code refactoring.

https://github.com/llvm/llvm-project/pull/95799