fix(protocol-designer): default reference fields to well-bottom or well-top

[jerader]

closes RQA-4300

Overview

Alex's ot-2 gut-check protocol failed analysis because the reference fields were all null. looking at the form, it makes sense to default those fields to well-bottom for aspirate/dispense position and well-top for retract & submerge positions in the presaved forms. i also fixed a small bug where we were incorrectly typing the value even though it was technically unknown.

Test Plan and Hands on Testing

upload the attached protocol (from the comment in the ticket) into the app. should pass analysis now since the position fields are not None

Changelog

• change default values for the reference fields to well-bottom or well-top - the liquid classes for Flex should update them correctly still, this is just the default values.
• fix a bug with the value in the modal

Risk assessment

low

[codecov]

Codecov Report

Attention: Patch coverage is 96.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 23.88%. Comparing base (d4b4804) to head (2e8fd92).
Report is 1 commits behind head on chore_release-pd-8.5.0.

Files with missing lines	Patch %	Lines
...rc/components/organisms/TipPositionModal/hooks.tsx	66.66%	1 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                   @@
##           chore_release-pd-8.5.0   #18690   +/-   ##
=======================================================
  Coverage                   23.87%   23.88%           
=======================================================
  Files                        3284     3284           
  Lines                      285497   285497           
  Branches                    29075    29075           
=======================================================
+ Hits                        68176    68177    +1     
+ Misses                     217297   217296    -1     
  Partials                       24       24           

Flag	Coverage Δ
protocol-designer	19.05% <96.00%> (+<0.01%)	⬆️

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

Files with missing lines	Coverage Δ
...rc/components/organisms/TipPositionModal/index.tsx	77.27% <100.00%> (ø)
...src/step-forms/test/createPresavedStepForm.test.ts	96.46% <100.00%> (ø)
...r/src/steplist/formLevel/getDefaultsForStepType.ts	89.86% <100.00%> (ø)
...list/formLevel/test/getDefaultsForStepType.test.ts	97.79% <100.00%> (ø)
...rc/components/organisms/TipPositionModal/hooks.tsx	39.78% <66.66%> (+0.65%)	⬆️

... and 1 file with indirect coverage changes

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