Separate step configurations from deployment

[schustmi]

Describe changes

This PR tackles some issues with pipeline deployments:

• Adds an option to specify which attributes to skip during dehydration. This is used to avoid recursing through lots of step configurations to check for rbac resources, even though we already know that there are none in there.
• Adds an option to only include a subset of step configurations when fetching a pipeline deployment. This reduces the response size.
• Stores the step configurations in a separate table instead of a column of the deployment. This allows us to only fetch the required step configurations instead of all of them at once.

Additionally, it removes a joined load when updating the pipeline run status. Due to the .with_for_update() call in the same SQL statement, this would try to acquire exclusive locks on both the pipeline run and the deployment. This was the cause of deadlocks when running multiple concurrent steps, as the step creation also requires locks (shared, not exclusive) on both the run and deployment.

Pre-requisites

Please ensure you have done the following:

• [ ] I have read the CONTRIBUTING.md document.
• [ ] I have added tests to cover my changes.
• [ ] I have based my new branch on develop and the open PR is targeting develop. If your branch wasn't based on develop read Contribution guide on rebasing branch to develop.
• [ ] IMPORTANT: I made sure that my changes are reflected properly in the following resources:
  • [ ] ZenML Docs
  • [ ] Dashboard: Needs to be communicated to the frontend team.
  • [ ] Templates: Might need adjustments (that are not reflected in the template tests) in case of non-breaking changes and deprecations.
  • [ ] Projects: Depending on the version dependencies, different projects might get affected.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Other (add details above)

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