1714 supervisor doesnt initialise config server url

[rtuck99]

Fixes #1714

Link to dodal PR (if required): #N/A

(remember to update pyproject.toml with the dodal commit tag if you need it for tests to pass!)

Instructions to reviewer on how to test:

1. Tests pass
2. hyperion starts in supervisor mode

Checks for reviewer

• Would the PR title make sense to a user on a set of release notes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.85%. Comparing base (700bc7e) to head (c62ce02).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1724   +/-   ##
=======================================
  Coverage   92.84%   92.85%           
=======================================
  Files         156      156           
  Lines        8557     8566    +9     
=======================================
+ Hits         7945     7954    +9     
  Misses        612      612           

Components	Coverage Δ
i24 SSX	77.15% <ø> (ø)
hyperion	98.65% <100.00%> (+<0.01%)	⬆️
other	98.31% <ø> (ø)

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