feat(app): add simple aggregate event tracking for custom labware

[mcous]

overview

This PR adds analytics events for various custom labware actions. Closes #4537

changelog

• feat(app): add simple agregate event tracking for custom labware

review requests

Pretty well covered by unit tests, but if you feel so inclined:

1. Set MIXPANEL_ID to our test application ID
2. Do various custom labware stuff
3. Observe actions

See original ticket for link to events specs

[sfoster1]

Tested, watched analytics events go through

[codecov]

Codecov Report

Merging #4544 into release_3.15.0 will increase coverage by 0.23%.
The diff coverage is 90.69%.

@@                Coverage Diff                 @@
##           release_3.15.0    #4544      +/-   ##
==================================================
+ Coverage           57.13%   57.36%   +0.23%     
==================================================
  Files                 905      906       +1     
  Lines               25711    25883     +172     
==================================================
+ Hits                14690    14849     +159     
- Misses              11021    11034      +13

Impacted Files	Coverage Δ
app/src/analytics/epics.js	100% <ø> (ø)	⬆️
app/src/analytics/mixpanel.js	13.04% <0%> (-1.25%)	⬇️
app/src/components/AddLabwareCard/index.js	100% <100%> (ø)	⬆️
app/src/components/layout/CardCopy.js	100% <100%> (ø)
app-shell/src/labware/index.js	100% <100%> (ø)	⬆️
app/src/custom-labware/actions.js	100% <100%> (ø)	⬆️
app/src/analytics/make-event.js	72.13% <95.83%> (+15.37%)	⬆️
app/src/protocol/index.js	100% <0%> (ø)	⬆️
opentrons/protocol_api/labware.py	90.51% <0%> (+0.37%)	⬆️
... and 3 more

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[sfoster1]

Also checked out the copy change, LGTM