Bimorph mirrors

[dan-fernandes]

Fixes writing to bimorph when bimorph is not IDLE.

Removes unnecessary readback tolerance.

Instructions to reviewer on how to test:

1. Check tests pass
2. Run a bimorph mirror plan (against the simulated bimorph on BL02J or a real bimorph) and check plan behaves as expected

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 97.52%. Comparing base (5c82bbd) to head (5d0de0b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #992      +/-   ##
==========================================
- Coverage   97.52%   97.52%   -0.01%     
==========================================
  Files         154      154              
  Lines        6393     6390       -3     
==========================================
- Hits         6235     6232       -3     
  Misses        158      158              

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[dan-fernandes]

I have had an in-office conversation with Andrew Foster. We are going to write to the bimorph through setting to VOUT rather than VTRGT.