Residual kernels for the full viscous stress formulation

[timofeymukha]

Adds the types to compute equation residuals for the full viscous stress formulation.

[timfelle]

I would suggest to disable all missing backends, such that we can get this pass CI and into develop

Or maybe throw an error from missing backends instead of doing nothing?

[njansson]

I would suggest to disable all missing backends, such that we can get this pass CI and into develop

Or maybe throw an error from missing backends instead of doing nothing?

Indeed, changed