Adjust and merge i22 Pilatus Ophyd Async device

[keithralphs]

A Pilatus detector Ophyd Async device exists in a Draft Pull request the DAQ-5039 branch. This needs to be examined and adjusted, if necessary, to be compatible with the 0.3a1 release of Ophyd Async and then merged into main with appropriate tests to confirm its operation (this assumes that the v0.3a1 dependency has already been established in the main branch). Ensure thorough unit tests are present.

Acceptance Criteria

• Pilatus device available
• Config for SAXS and WAXS available in i22 beamline module
• All unit tests for the device pass
• The device has been tested in a bluesky terminal on i22 using the count plan and performs correctly