fix(api): Add a Patch Workflow endpoint

[tatarco]

What changed? Why was the change needed?

1. Added Workflow Patch API.
2. Modified Rest to work without a list of fields to update, both for step and workflow.
3. removed URI validation from avatar to enable sending variable inside.

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### Related enterprise PR ### Special notes for your reviewer

[linear[bot]]

NV-4763 Creating a patch for workflow

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commit: e5597a6