Disable actions for deleted workflows

[midigofrank]

Description

This PR disables the workflow edit form whenever a deleted workflow is opened. The save and run form for manual runs is also disabled.

It also adds the restriction on the retry logic. Only un-deleted workflows can be retried.

Closes #2170

Validation steps

In order to test this, you'll need an existing workflow with some workorders and runs.

1. Delete the workflow
2. Go to the runs page. Try retrying a run/workorder for the deleted workorder.
   • When you try retrying individually, you'll get an error saying Runs for deleted workflows cannot be retried.
   • When you retry in bulk, you'll see that a certain number was discarded because the workflow was disabled/deleted
3. Click to inspect one of the steps for that run. You'll see that the job inspector has the action buttons (save/retry) disabled. The whole workflow form is disabled, you cannot even modify the job name

AI Usage

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• Code generation (copilot but not intellisense)
• Learning or fact checking
• Strategy / design
• Optimisation / refactoring
• Translation / spellchecking / doc gen
• Other
• I have not used AI

You can read more details in our Responsible AI Policy

Pre-submission checklist

• I have performed a self-review of my code.
• I have implemented and tested all related authorization policies. (e.g., :owner, :admin, :editor, :viewer)
• I have updated the changelog.
• I have ticked a box in "AI usage" in this PR

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 91.07%. Comparing base (7fe5798) to head (d88134e).

Files with missing lines	Patch %	Lines
lib/lightning_web/live/workflow_live/edit.ex	88.88%	5 Missing ⚠️
lib/lightning_web/live/run_live/index.ex	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2671      +/-   ##
==========================================
- Coverage   91.09%   91.07%   -0.02%     
==========================================
  Files         331      331              
  Lines       11609    11642      +33     
==========================================
+ Hits        10575    10603      +28     
- Misses       1034     1039       +5     

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