build(python): configure setuptools to use legacy editable installs

[mcous]

Overview

This PR fixes mypy failures that started happening locally and in CI this week by implementing a workaround suggested in python/mypy#13392.

Changelog

• build(python): configure setuptools to use legacy editable installs

Review requests

Please note that after this PR, CI will not be green due to continued conflict resolution errors from #11320. I will be opening a separate PR for those fixes for history cleanliness

• API lint CI passes fails for legitimate reasons
• Robot Server lint CI passes fails for legitimate reasons
• Running make setup && make lint works locally in api and robot-server

Risk assessment

I think low, but sort of hard to say...

[SyntaxColoring]

Looks good to me if CI passes. Thanks!

[codecov]

Codecov Report

Merging #11341 (589c87b) into edge (c5aec79) will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             edge   #11341      +/-   ##
==========================================
+ Coverage   74.57%   74.63%   +0.05%     
==========================================
  Files        2047     2047              
  Lines       56800    56892      +92     
  Branches     5526     5526              
==========================================
+ Hits        42361    42463     +102     
+ Misses      13198    13188      -10     
  Partials     1241     1241              

Flag	Coverage Δ
app	74.71% <ø> (ø)
components	53.32% <ø> (ø)
g-code-testing	97.13% <ø> (+<0.01%)	⬆️
hardware	59.95% <ø> (+1.09%)	⬆️
labware-library	49.74% <ø> (ø)
notify-server	89.17% <ø> (ø)
protocol-designer	45.81% <ø> (ø)
react-api-client	82.98% <ø> (ø)
shared-data	86.08% <ø> (+0.06%)	⬆️
step-generation	88.39% <ø> (ø)
update-server	73.20% <ø> (ø)

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

Impacted Files	Coverage Δ
...ware/opentrons_hardware/hardware_control/motion.py	80.59% <0.00%> (-3.53%)	⬇️
hardware/opentrons_hardware/sensors/sensor_abc.py	78.12% <0.00%> (-1.19%)	⬇️
...ons_hardware/hardware_control/move_group_runner.py	80.11% <0.00%> (-0.13%)	⬇️
shared-data/js/constants.ts	100.00% <0.00%> (ø)
hardware/opentrons_hardware/scripts/move.py	0.00% <0.00%> (ø)
hardware/opentrons_hardware/scripts/gripper.py	0.00% <0.00%> (ø)
hardware/opentrons_hardware/scripts/sensors.py	0.00% <0.00%> (ø)
hardware/opentrons_hardware/scripts/sensor_pass.py	0.00% <0.00%> (ø)
...ardware/opentrons_hardware/scripts/sensor_utils.py	0.00% <0.00%> (ø)
...ware/opentrons_hardware/scripts/monitor_sensors.py	0.00% <0.00%> (ø)
... and 24 more