Move mul_with_projection/rmul_with_projection to Geometry module

[charleskawczynski]

These two methods are pretty tied to the geometry module, and don't depend on anything else. Moving them to the Geometry module will allow us to test the Geometry module with a wider set of inputs (and, eg., test for inference).

For example, #1828 is passing the Geometry tests, but then fail downstream, even though those changes only pertain to the geometry module.

[charleskawczynski]

In addition, we should add more inference tests to the geometry module, as we're having many issues in MatrixField inference.