fix(protocol-designer): prevent liquid handling steps if no compatible labware

[ncdiehl11]

Overview

This PR refines AddStepButton's supported steps logic for mix and moveLiquid, by checking the presence of compatible labware during the creation of the step. These two liquid handling options should only be shown if:

1. the labware is on deck
2. the labware is not an adapter
3. the labware is not a tiprack

Closes RQA-3409

Test Plan and Hands on Testing

Case 1 - labware available

• create or import a protocol whose final state includes liquid handling-compatible labware on deck
• verify that the add step button menu shows transfer and mix steps

Case 2 - labware unavailable

• delete or move all liquid handling-compatible labware off deck
• verify that the add step button menu does not show transfer and mix steps
• navigate to starting deck state, and add an adapter to the deck
• verify that the add step button menu still does not show transfer and mix steps
• navigate to starting deck state, and add a tiprack to the deck
• verify that the add step button menu still does not show transfer and mix steps

Changelog

• update AddStepButton logic for enabled steps
• update util, constants, and tests

Review requests

see test plan

Risk assessment

low-medium. want to be sure we don't accidentally hide those two steps unintentionally

[koji]

the changes look good and sandbox worked as expected