Quadrature-points symbol not stored as table

MWE:
```python
import basix.ufl
import ufl.geometry
cell = "interval"
el =basix.ufl.element("Lagrange", cell, 1, shape=(1, ))
mesh = ufl.Mesh(el)

x = ufl.geometry.CellCoordinate(mesh)
J = x[0]*ufl.dx
```
FFCx doesn't current create a table for the reference quadrature points, which means that the `CellCoordinate` and `FacetCoordinate` from ufl doesn't work.