Tuple-based constitutive relations in SmallDeformation and LargeDeformation.

Dmitri Naumovrequested to merge
endJunction/ogs:SD_LD_refactorings into master
  • Replacing the structs with tuples containing strong types same as it is in TRM.
  • Refactor some common classes to ProcessLib/ConstitutiveRelations to be reused.

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