Changes to zocalo interaction to enable containerisation

[rtuck99]

Removes dependency on the system hostname from zocalo so that we can be run in a container

See DiamondLightSource/hyperion#1511

Instructions to reviewer on how to test:

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

Attention: Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.

Project coverage is 94.43%. Comparing base (608d913) to head (b5a5d0d).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/dodal/devices/zocalo/zocalo_results.py	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #725      +/-   ##
==========================================
- Coverage   94.48%   94.43%   -0.06%     
==========================================
  Files         113      113              
  Lines        4571     4581      +10     
==========================================
+ Hits         4319     4326       +7     
- Misses        252      255       +3     

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[dperl-dls]

lgtm