Automatically keep I22 and P38 in sync

As a developer I would like to keep P38, at least from an ophyd point of view, as a close representation of I22. Currently they are treated as different beamlines with some similar components.

## Possible Solution

Could we somehow define different versions of particular devices?

## Acceptance Criteria

- [ ] There should be one module, i22.py, p38.py should be deleted
- [ ] dodal connect i22 should work without errors when the I22 PVs are available
- [ ] dodal connect i22 --profile p38 or BEAMLINE=p38 dodal connect i22 (syntax can differ) should work when the P38 PVs are available
- [ ] There should be no errors in either case, dodal should handle the differences between the beamlines

from https://github.com/DiamondLightSource/dodal/issues/502#issuecomment-2232766949