[flang][OpenMP][OpenACC] remove libEvaluate dependency in passes (#123784) Move OpenACC/OpenMP helpers from Lower/DirectivesCommon.h that are also used in OpenACC and OpenMP mlir passes into a new Optimizer/Builder/DirectivesCommon.h so that parser and evaluate headers are not included in Optimizer libraries (this both introduce compile-time and link-time pointless overheads). This should fix https://github.com/llvm/llvm-project/issues/123377
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