Fix system tests caused by zocalo and smargon changes

[olliesilvester]

Should fix the two test failures seen in https://gitlab.diamond.ac.uk/MX-GDA/hyperion-system-testing/-/jobs/319770

Link to dodal PR (if required): #XXX
(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. Do thing x
2. Confirm thing y happens

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 92.81%. Comparing base (e122b0b) to head (e4fba12).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1628   +/-   ##
=======================================
  Coverage   92.81%   92.81%           
=======================================
  Files         153      153           
  Lines        8642     8642           
=======================================
  Hits         8021     8021           
  Misses        621      621           

Components	Coverage Δ
i24 SSX	78.60% <ø> (ø)
hyperion	98.22% <ø> (ø)
other	98.22% <ø> (ø)

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[rtuck99]

I ran the tests with your change and I'm still getting

  File "/scratch/ws/hyperion/mx-bluesky/tests/system_tests/hyperion/external_interaction/callbacks/test_external_callbacks.py", line 256, in test_external_callbacks_handle_gridscan_ispyb_and_zocalo
    assert dcid != 0
AssertionError: assert 0 != 0

[rtuck99]

Still get the test failure even with #1627 merged, will approve this and investigate why that is still happening

[rtuck99]

Still get the test failure even with #1627 merged, will approve this and investigate why that is still happening

Found it, pushed commit