ENH: Regroup and unify various virtual functions in laminar/RAS/LES models

Summary

• Regroup and unify various virtual functions in laminar/RAS/LES models

Resolved bugs

N/A

Risks

• No changes to user input.
• No changes in output.
  • From now on, Ce is printed out to streams only when it is specified in turbulenceProperties (similar to kMin).
  • Few models had been specifying the boundary conditions of helper functions: kOmegaSSTBase, kOmegaSST. This has been removed. No detrimental effects are expected.

Tests

• Compilation (incl. submodules):
  • linux64ClangDPInt32Opt (clang11)
  • linux64GccDPInt32Opt
  • linux64GccSPDPInt64Debug
• Alltest: No change in output with respect to the develop HEAD + no error