Fast energy scan plan

[Relm-Arrowny]

Fixes #99

Re-factor fast_scan:

• Added cache and restore_speed to plan stub motion for restoring speed of motor.
• Change plan_stubs detector plans to detection and added fly_trigger and read to do software trigger scan.
• Added soft_fly_energy_scan to fast_scan.py.
• Move random detector to conftest.py
• Added i10 lookup table for testing.

Instructions to reviewer on how to test:

1. Run test.
2. Confirm it pass and re factoring make sense.

Checks for reviewer

• Would the PR title make sense to a user on a set of release notes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.42%. Comparing base (d6c139d) to head (4e12bd6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #100      +/-   ##
==========================================
+ Coverage   98.34%   98.42%   +0.07%     
==========================================
  Files          25       25              
  Lines         605      634      +29     
==========================================
+ Hits          595      624      +29     
  Misses         10       10              

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[oliwenmandiamond]

Why create a FakePGM, surely you can just use PGM device in mock mode and then use patch_mock_motor with it?

[Relm-Arrowny]

I need simMotor rather than just mock, I need the motor to be non instant to test flying scan.

[Relm-Arrowny]

This is waiting for dodal#1467