fix: Use experiment config to determine is_multi_trial in api_runs queries

[AmanuelAaron]

Ticket

ET-296

Description

We want to use the experiment config to determine whether a run is part of a multitrial experiment(search) or not.

Test Plan

Existing tests should pass

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.

[netlify]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.01%. Comparing base (418525e) to head (6e29f94).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9475   +/-   ##
=======================================
  Coverage   49.00%   49.01%           
=======================================
  Files        1234     1234           
  Lines      159699   159699           
  Branches     2781     2780    -1     
=======================================
+ Hits        78261    78275   +14     
+ Misses      81263    81249   -14     
  Partials      175      175           

Flag	Coverage Δ
backend	43.82% <100.00%> (+0.03%)	⬆️
harness	64.04% <ø> (-0.01%)	⬇️
web	44.12% <ø> (ø)

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

Files	Coverage Δ
master/internal/api_runs.go	73.55% <100.00%> (ø)

... and 10 files with indirect coverage changes

[corban-beaird]

Looks solid!