make Apple2 max phase and gap limits configurable

[Villtord]

Fixes #1817
Allows to configure max phase and gap limits in apple2 controller which is helpful for child classes.

Instructions to reviewer on how to test:

1. Do thing x
2. Confirm thing y happens

Checks for reviewer

• Would the PR title make sense to a scientist on a set of release notes
• If a new device has been added does it follow the standards
• If changing the API for a pre-existing device, ensure that any beamlines using this device have updated their Bluesky plans accordingly
• Have the connection tests for the relevant beamline(s) been run via dodal connect ${BEAMLINE}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.14%. Comparing base (11c03e6) to head (c9e2b5f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1816   +/-   ##
=======================================
  Coverage   99.14%   99.14%           
=======================================
  Files         289      289           
  Lines       10970    10972    +2     
=======================================
+ Hits        10876    10878    +2     
  Misses         94       94           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Relm-Arrowny]

very sensible, LGTM