I09-1 switch to config_server for hard undulator lut

[Villtord]

Fixes #

Instructions to reviewer on how to test:

1. Do thing x
2. Confirm thing y happens

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 99.08%. Comparing base (384caa2) to head (f816f60).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1798   +/-   ##
=======================================
  Coverage   99.08%   99.08%           
=======================================
  Files         299      299           
  Lines       11387    11405   +18     
=======================================
+ Hits        11283    11301   +18     
  Misses        104      104           

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