[flang][Lower] Add Lowering for CO_{BROADCAST, MAX, MIN, SUM} to PRIF (llvm#154770)

In relation to the approval and merge of the
llvm#76088 specification about
multi-image features in Flang.
Here is a PR on adding support of the collectives CO_BROADCAST, CO_SUM,
CO_MIN and CO_MAX in conformance with the PRIF specification.

---------

Co-authored-by: Dan Bonachea <[email protected]>

Author: JDPailleux

flang/include/flang/Optimizer/Builder/Runtime/Coarray.h

@@ -81,5 +81,6 @@ void genSyncMemoryStatement(fir::FirOpBuilder &builder, mlir::Location loc,
 void genSyncImagesStatement(fir::FirOpBuilder &builder, mlir::Location loc,
                             mlir::Value imageSet, mlir::Value stat,
                             mlir::Value errmsg);
+
 } // namespace fir::runtime
 #endif // FORTRAN_OPTIMIZER_BUILDER_RUNTIME_COARRAY_H