Add ability to control shutter source

[DominicOram]

See DiamondLightSource/mx-bluesky#232

Instructions to reviewer on how to test:

1. Confirm dodal connect i03 works

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 94.55%. Comparing base (08c2764) to head (9e0e09a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #770   +/-   ##
=======================================
  Coverage   94.54%   94.55%           
=======================================
  Files         115      115           
  Lines        4622     4630    +8     
=======================================
+ Hits         4370     4378    +8     
  Misses        252      252           

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[olliesilvester]

Optional suggestions in the comments. Also, I didn't verify that

AUTO_SHUTTER_GATE = 2
AUTO_SHUTTER_INPUT = 1

are correct. On a separate note, some of the constants in that file are specific to i03's Zebra - that might be misleading to other beamlines

[DominicOram]

On a separate note, some of the constants in that file are specific to i03's Zebra - that might be misleading to other beamlines

I've made #772 to clean this all up