ENH: functionObjects: rearrange the location of phaseSystemModels function objects

phaseSystemModels function objects are relocated within
functionObjects in order to enable broader usage.

ENH: multiphaseInterHtcModel: new heatTransferCoeff function object model
COMP: createExternalCoupledPatchGeometry: add new dependencies
COMP: alphaContactAngle: avoid duplicate entries between multiphaseEuler and reactingEuler
TUT: damBreak4Phase: rename alphaContactAngle as multiphaseEuler::alphaContactAngle