replace listCombineReduce with allGatherList etc.
In places such as CloudIO.C, patchInjectionBase.C, turbulentDFSEMInletFvPatchVectorField.C (probably more), there is use of listCombineReduce to collect values from each processor into a list. This particular usage is directly equivalent to using allGatherList, which also corresponds to an MPI intrinsic for primitive types.