[@soudah] Fluid non newtonian const. laws with qsvms element

[jginternational]

Added 2 constitutive laws forn non newtonian fluids

Changed the element from vms to qsvms

[jginternational]

ping @KratosMultiphysics/fluid-dynamics

[rubenzorrilla]

We should decide if the reference monolithic element is now the QSVMS (this goes in) or if we keep the VMS one (this is closed).

If we decide that the QSVMS becomes the reference one, I wouldn't add the non-newtonian laws until we have implemented their 2D version.

[rubenzorrilla]

Guys, this PR deals with the addition of the non-newtonian constitutive laws and the setting of the QSVMS as reference element in the FluidDynamicsApplication.

I can see some changes related with the Wall Shear Stress (WSS) developments, which are out of the scope of the PR and the FluidDynamicsApplication.

Having said this I'd:

• remove the WSS-related changes from this PR
• add the WSS (and other Biomedical magnitudes) to a new GUI derived from the fluid one. Note that these magnitudes make not so much sense when solving non-biomedical problems.

[rubenzorrilla]

(blocking to avoid accidental merge)

[jginternational]

Thanks @rubenzorrilla

Let @soudah play in this branch. I won't allow the merging until a Bio** Application (derived from fluid dynamics) is created for these changes.