[clang] [OpenMP] Support capturing structured bindings in OpenMP regions. (PR #190832)

[Zahira Ammarguellat via cfe-commits]

zahiraam wrote:

> > > What about using these elements in linear, reductions, lastprivates?
> > 
> > 
> > This patch focuses on `private` and `firstprivate` clauses. We can either implement all remaining clauses now or add them in a follow-up patch. WDYT?
> 
> They should be supported automatically, there is no big difference between these clauses, so would be good to handle them all at once

Done.

https://github.com/llvm/llvm-project/pull/190832