Remove lid from grid box form, add c-clip direction

[gfrn]

Summary:

Since eBIC already has tools for both types of lid, asking users which lid they're using for the grid box is essentially useless. Instead, it would be more useful to know the c-clip direction on the grids.

Changes:

• Remove lid from grid box form, add c-clip direction

To test:

• Go to https://local-oidc-test.diamond.ac.uk:9000/proposals/bi23047/sessions/100/shipments/118/gridBox/new/edit, check if the form has a "C-Clip Direction" field