Allow a dev-mode device at Stage 0 to be triggered

[knolleary]

Closes #5079

Description

This updates the UI constraints applied around Pipelines to allow a Device in Dev Mode to be a valid first stage in a pipeline.

This simplifies the workflow for using pipelines with Dev Mode devices; you don't have to take the device out of dev mode in order to move its snapshot to other devices.

This is a simple iteration that allows for the existing Deploy Actions to be chosen. There is scope to add a 'Create Snapshot' action - but that would only work if the device was in dev mode. Given the complications that introduces, in the spirit of fast iteration, I'm going with the existing available actions.

The workflow is then:

1. Put device in dev mode, work on flows
2. When ready to deploy via pipeline, create a snapshot (or rely on the auto-snapshot from your last deploy)
3. Ensure the pipeline stage is configured to 'use latest snapshot' - not 'use active snapshot'.

This last point is one small potential gotcha. Whilst the device is in dev mode, the 'active' snapshot is whatever snapshot was deployed to the device before it was put into dev mode. The 'latest' snapshot is the most recently created one.

In terms of UX changes, for a Stage0 device in dev mode, I've removed the red warning banner, but left the warning text in place.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.40%. Comparing base (f39d095) to head (0815eed).
Report is 2 commits behind head on main.

Additional details and impacted files

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##             main    #5089   +/-   ##
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  Coverage   78.40%   78.40%           
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  Files         329      329           
  Lines       15501    15501           
  Branches     3582     3582           
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  Hits        12154    12154           
  Misses       3347     3347           

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[Steve-Mcl]

I approve :)