805 move p99 detectors into dodal

[Relm-Arrowny]

Fixes #805

Instructions to reviewer on how to test:

1. Run unit test
2. Confirm connections.

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 95.21%. Comparing base (73cbfc9) to head (1f19633).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #807      +/-   ##
==========================================
+ Coverage   95.12%   95.21%   +0.08%     
==========================================
  Files         120      124       +4     
  Lines        4901     4993      +92     
==========================================
+ Hits         4662     4754      +92     
  Misses        239      239              

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[DominicOram]

Some comments in code. Additionally, I would recommend more tests that are smaller and more descriptive. For example:

• test_get_deadtime_returns_expected <- just test deadtime
• test_given_trigger_number_of_0_then_number_of_images_set_to_max
• test_given_no_live_time_then_esposure_time_not_set
  The advantage of this is it very clearly lays out what is expected of the device and if one of them fail in the future it should be obvious to someone what went wrong. In general I would expect a device like this to have maybe a dozen small tests like this.