Remove deprecated all_21 parameter

This parameter has triggered a warning for a while and is now replaced by the fill_method parameter. The first commit removes the parameter and adapts the tests accordingly.

In my next commit I will remove 

```C++
  // Deprecated method, remove after existing Tensor Mechanics applications have been updated
  void fillFromInputVector(const std::vector<Real> input, bool all_21);
```

(after making sure it i not used anywhere else).

**This change needs a corresponding commit in Marmot and Hyrax!**