Y24-396: Refactor Automatic State Changers

[StephenHulme]

Closes #2002

Changes proposed in this pull request

• Refactor labware state changers to be specialised by labware and use mixins for alternative behaviour
  • Solves bug where a tube thinks it's a plate and calls the contents_for method of DefaultStateChanger which was originally designed for plates and not tubes
• Refactor and add state changer unit tests

Instructions for Reviewers

[All PRs] - Confirm PR template filled
[Feature Branches] - Review code
[Production Merges to main]
    - Check story numbers included
    - Check for debug code
    - Check version

[StephenHulme]

Will likely conflict with #2034, probably best to let that be merged in first, then refactor as required.