fluids: Correct PetscFunction{Return,BeginUser} placement- Respect the PETSc standard for style (https://petsc.org/release/developers/style/#coding-conventions-and-style)
Merge pull request #1308 from CEED/jrwrigh/setup_femFluids: Add DMSetupByOrder helper functions
fluids: Add DMSetupByOrder_* helper function
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