Add post endpoint for dataset events

[edumuellerFSL]

related: #36723

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This PR introduces a new POST endpoint for dataset events in Apache Airflow. It allows for the registration of dataset events, enabling more dynamic tracking and management of datasets within Airflow workflows. The changes include modifications to API endpoints, schema definitions, dataset managers, security permissions, and corresponding unit tests to ensure functionality and security compliance.

Changes

• API Endpoints: Added a new post endpoint (post_dataset_event) to dataset_endpoint.py for creating dataset events, along with necessary security checks and action logging.
• OpenAPI Specification: Updated the openapi/v1.yaml file to include the new post endpoint under /datasets/events, including request and response schema definitions.
• Dataset Manager: Modified manager.py to support registering dataset changes without a task instance and to return a DatasetEvent object.
• Security Permissions: Updated security_manager/override.py to include create permissions for the dataset resource.
• UI and Types: Adjusted JavaScript components and API-generated types to accommodate the new changes.
• Unit Tests: Added comprehensive tests in test_dataset_endpoint.py and test_dataset_schema.py to cover the new endpoint functionality and schema validation.

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[cmarteepants]

@Lee-W @pankajkoti

[ephraimbuddy]

LGTM

[dstandish]

one or two suggestions