Implement JAX conversion for Scan with mit-mot

[ricardoV94]

Description

#232 left this case out, we should support it.

Such Scan show up (and only then) when we take the gradient of another Scan.

[jessegrabowski]

I'd like this fixed. Where should I start looking to figure out what needs to be done?

[ricardoV94]

Look at the python perform method / numba impl?