ENH: refactor function arg splitting -> stringOps::splitFunctionArgs

applications/test/splitFunctionArgs/Make/files

applications/test/splitFunctionArgs/Make/options

applications/test/splitFunctionArgs/Test-splitFunctionArgs.C

applications/test/splitFunctionArgs/testNames1

src/OpenFOAM/Make/files

...b/functionObjects/functionObjectList/functionObjectList.C

src/OpenFOAM/primitives/strings/stringOps/stringOps.C

src/OpenFOAM/primitives/strings/stringOps/stringOps.H

src/OpenFOAM/primitives/strings/stringOps/stringOpsSplit.C

...penFOAM/primitives/strings/stringOps/stringOpsTemplates.C