Pass the plugins on from i22's detectors

[DominicOram]

From testing on i22 we found that the stats plugin wasn't actually getting associated with the detectors. This passes it on properly. This was also masking the issue in bluesky/ophyd-async#1278

Instructions to reviewer on how to test:

1. Run dodal connect i22 on this branch and confirm it fails
2. Switch over your ophyd-async to use Only use the RBV PV for the read only signals in the stats plugin bluesky/ophyd-async#1278, confirm dodal connect passes

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 99.14%. Comparing base (f787f83) to head (c0825d5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2077   +/-   ##
=======================================
  Coverage   99.14%   99.14%           
=======================================
  Files         341      341           
  Lines       13287    13287           
=======================================
  Hits        13173    13173           
  Misses        114      114           

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