Update to work with next version of ophyd-async

[DominicOram]

Update to work with bluesky/ophyd-async#646. Wait for that to be merged + new ophyd-async release before merging this.

Contains fix from #903 so merge that first

Instructions to reviewer on how to test:

1. Confirm tests still pass

Checks for reviewer

• Would the PR title make sense to a scientist on a set of release notes
• If a new device has been added does it follow the standards
• If changing the API for a pre-existing device, ensure that any beamlines using this device have updated their Bluesky plans accordingly
• Have the connection tests for the relevant beamline(s) been run via dodal connect ${BEAMLINE}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.78%. Comparing base (82d6afc) to head (4b03309).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #899      +/-   ##
==========================================
- Coverage   95.78%   95.78%   -0.01%     
==========================================
  Files         133      133              
  Lines        5479     5476       -3     
==========================================
- Hits         5248     5245       -3     
  Misses        231      231              

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[stan-dot]

@DominicOram can we get a specific version number of ophyd-async for this please?

[DominicOram]

It's whatever the next version of ophyd-async will be so I assume 0.8.0 or maybe 0.8.0a5. Basically, this should match what is on ophyd-async main currently

[callumforrester]

LGTM! Thanks

[noemifrisina]

lgtm, thanks