[flang-commits] [flang] Reapply "[Flang][OpenMP][Lower] NFC: Move clause processing helpers into the ClauseProcessor (#85258)" (PR #85807)

[Tom Eccles via flang-commits]

https://github.com/tblah approved this pull request.

Thanks for the fix! The gfortran test suite passes on this for me now.

nit: maybe we should have a flang unit test for multiple reduction clauses so we don't miss this again?

https://github.com/llvm/llvm-project/pull/85807