Ophyd pin tip: Trigger and wait for the device to find a pin

[DominicOram]

As of #938, if we don't find a pin from the ophyd pin detection we wait a second and try again. Instead we should trigger the pin tip detection and wait for it to find a valid pin with a timeout, this is more like how the AD pin tip detection works.

Acceptance Criteria

• The ophyd pin tip detection allows triggering
• When it is triggered it will only return when a valid pin is found or a timeout is reached
• The subsequent read will return this valid position

[DominicOram]

Once we do this we should be able to remove the wait_for_tip_to_be_found_ophyd specific function