fix(app, robot_server): allow non-standard tip racks in tip length calibration from dashboard

[b-cooper]

Overview

Mirror our approach for loading an alternate tip rack into a legacy calibration session from deck/pipette-offset to tip length calibration

Closes RAUT-809

Review requests

• starting with no tip length calibration values on an OT-2 proceed to the calibration dashboard
• you should be able to select an alternate tip rack for performing TLC on a pipette.
• that alternate tip rack should be used when calibrating the pipette offset in the next step

Risk assessment

high, this touches both FE and BE and the code is quite old and brittle

[codecov]

Codecov Report

Merging #13891 (a391041) into edge (b242919) will increase coverage by 0.00%.
Report is 7 commits behind head on edge.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             edge   #13891   +/-   ##
=======================================
  Coverage   70.86%   70.86%           
=======================================
  Files        2501     2501           
  Lines       70338    70360   +22     
  Branches     8600     8610   +10     
=======================================
+ Hits        49844    49862   +18     
- Misses      18398    18400    +2     
- Partials     2096     2098    +2     

Flag	Coverage Δ
app	68.88% <100.00%> (+0.01%)	⬆️

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

Files	Coverage Δ
app/src/organisms/CalibrateDeck/index.tsx	77.14% <ø> (ø)
app/src/organisms/CalibrateTipLength/index.tsx	75.00% <100.00%> (+0.71%)	⬆️
...organisms/CalibrationPanels/Introduction/index.tsx	85.29% <100.00%> (+0.44%)	⬆️
...Dashboard/hooks/useDashboardCalibrateTipLength.tsx	78.94% <ø> (ø)
...t_server/robot/calibration/tip_length/user_flow.py	94.73% <ø> (-0.04%)	⬇️

... and 1 file with indirect coverage changes

[mjhuff]

Working as expected and code makes sense. Thanks for walking me through the backend!