Pytest fails due to weak_type for Quantity arrays

[TheSkyentist]

When a new Quantity is created, the JAX array has the property weak_type=True. This causes errors in some of the pytests, since they expect arrays without this property. I'm not sure what the pros/cons of weak_typing these arrays is, is this the desired behaviour? Based on testing done in #307.

[nstarman]

Weak typing is great! In JAX, weak typing means it's minimizing type conversions while still following Python’s / numpy's built-in numeric types. The weak type gets resolved when promotion is required.
Now making sure that unxt consistently produces weak/strong types across tests / versions / PRs, that's important!

[TheSkyentist]

Good to know! I'm glad it's the ideal behaviour in a lot of circumstances.