Get rid of openpilot.common.numpy_fast

[adeebshihadeh]

This optimization likely no longer makes sense in the post comma two world. After it's done, we should do some casual profiling to make sure we really don't need it.

It should also be removed from opendbc.

[adeebshihadeh]

I see in #34332 that there's tons of casts from numpy to Python types. Can we just patch pycapnp to handle this for us?

[Shaikimram]

hey @adeebshihadeh, I would like to take up this issue.

[sunnyhaibin]

hey @adeebshihadeh, I would like to take up this issue.

Open a PR. You do not need to request for permission to work on the issue.