219 refactor workflow automation to use berkley metadata models

[mbthornton-lbl]

This PR provides updates to the workflow_automation framework to be compatible with Berkley metadata models and runtime endpoints.

This PR merges in these workflow configuration changes from:

1. Update berkeley configs #237

• update nmdc_automation/configs/workflows.yaml for berkeley schema #150
• Update nmdc_automation/configs/import.yaml for Berkeley schema #151

This PR provides:

Update activities.py to be compatible with Berkley metadata:

• update nmdc_automation/workflow_automation/activities.py for berkeley schema  #153
  Changes
• refactored activities.py to workflow_process.py
• refactored methods e.g. load_activities -> load_workflow_process_nodes
• updated test fixtures to Berkley-compliant data
• updated and added unit tests
• Refactor Activity class #226
  Changes:
• Activity class is refactored to models.WorkflowProcessNode
• process attribute holds NMDC PlannedProcess object. DataGeneration and WorkflowExecution are subtypes.
• data classes moved to models.py and added
• added unit tests for object creation in test_models.py

Update endpoint use

• Update workflow automation to use Berkley-style API endpoints #221
  Changes:

Refactor Watcher Class
Watcher -> Watcher, FileHandler, JobManager, RuntimeApiHandler

[aclum]

See individual comments.