[clang] [clang][OpenMP] Add const-qualified `getIteratorModifier` to OMPMapClause (PR #86666)

[Alexey Bataev via cfe-commits]

alexey-bataev wrote:

> I don't think so, because nothing is failing without it. This is just for completeness.
> 
> Edit: My code will use it, but at the moment there aren't any users that I know of.

Are you going to submit your code?

https://github.com/llvm/llvm-project/pull/86666