chore: fix error on terminating experiments on restart

[NicholasBlaskey]

Description

Was getting some errors in logs related to being unable to update the trial view.

Fix these errors and add a test

Test Plan

Integration test

Commentary (optional)

Checklist

• Changes have been manually QA'd
• User-facing API changes need the "User-facing API Change" label.
• Release notes should be added as a separate file under docs/release-notes/.
  See Release Note for details.
• Licenses should be included for new code which was copied and/or modified from any external code.

Ticket

[netlify]

✅ Deploy Preview for determined-ui canceled.

Name	Link
🔨 Latest commit	0e43030
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7a13863) 47.69% compared to head (0e43030) 47.70%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8837      +/-   ##
==========================================
+ Coverage   47.69%   47.70%   +0.01%     
==========================================
  Files        1065     1065              
  Lines      169611   169611              
  Branches     2238     2240       +2     
==========================================
+ Hits        80897    80917      +20     
+ Misses      88556    88536      -20     
  Partials      158      158              

Flag	Coverage Δ
backend	43.52% <100.00%> (+0.05%)	⬆️
harness	64.11% <ø> (ø)
web	42.55% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
master/internal/db/postgres_experiments.go	48.66% <100.00%> (+2.81%)	⬆️

... and 1 file with indirect coverage changes