fix(api): fix thread manager definition

[pmoegenburg]

Overview

Attempts to address the following issue:

Hi, we are having the following issue when trying to run calibrate_belts() from ot3repl on DVT-10 robot with [email protected]:
>>> calibrate_belts(OT3Mount.LEFT, "P50SV3420230621A01") Traceback (most recent call last): File "<console>", line 1, in <module> File "/opt/opentrons-robot-server/opentrons/hardware_control/scripts/repl.py", line 102, in synchronizer return asyncio.get_event_loop().run_until_complete( File "/usr/lib/python3.8/asyncio/events.py", line 639, in get_event_loop raise RuntimeError('There is no current event loop in thread %r.' RuntimeError: There is no current event loop in thread 'MainThread'.

Test Plan

• verify multiple calls of calibrate_belts method call produce accurate results without above error

Changelog

Review requests

Risk assessment

[codecov]

Codecov Report

Merging #12948 (b66869e) into edge (6b09817) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             edge   #12948   +/-   ##
=======================================
  Coverage   72.91%   72.92%           
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  Files        2346     2346           
  Lines       64354    64352    -2     
  Branches     7163     7163           
=======================================
  Hits        46926    46926           
+ Misses      15753    15751    -2     
  Partials     1675     1675           

Flag	Coverage Δ
g-code-testing	96.44% <ø> (ø)
notify-server	89.13% <ø> (ø)

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Impacted Files	Coverage Δ
api/src/opentrons/hardware_control/scripts/repl.py	0.00% <ø> (ø)

[sfoster1]

If this fixes things and passes tests, go for it!