fix(hardware): only listen to the correct acknowledge messages from CAN

[ahiuchingau]

Overview

We should only add the message to the ack queue if the message index matches, so we don't accidentally report the wrong error, like this:

opentrons-api[187176]: Setting gantry load to GantryLoad.HIGH_THROUGHPUT
.... stop request errors .....
opentrons-api[187176]: received error ErrorCode.stop_requested trying to set currents for NodeId.gantry_x

[sfoster1]

Lol whoopsie!

[codecov]

Codecov Report

Merging #13937 (b336207) into edge (d7c25b2) will not change coverage.
Report is 3 commits behind head on edge.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             edge   #13937   +/-   ##
=======================================
  Coverage   70.62%   70.62%           
=======================================
  Files        2481     2481           
  Lines       69984    69984           
  Branches     8525     8525           
=======================================
  Hits        49426    49426           
  Misses      18465    18465           
  Partials     2093     2093           

Flag	Coverage Δ
hardware	56.85% <100.00%> (ø)
notify-server	89.13% <ø> (ø)

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

Files	Coverage Δ
...pentrons_hardware/drivers/can_bus/can_messenger.py	84.76% <100.00%> (ø)