feat(engine): Implement runtime action tests

[daryllimyt]

API

# tracecat workflow run <wf_id> --test
tests:
  # If an action has a test, do not run the action and mock/patch the output
  - ref: pull_crowdstrike_alerts
    enable: true # default: true
    validate_args: true # default: true
    # Path (use fsspec to support both local files and http)
    # to sample JSON or YAML content (to be JSONfied)
    success: # This is the mocked/patched output for the action.
    failure: # TODO

config:
    # Statically configure this here, or omit this and pass it in at execution time
    enable_runtime_tests: true

Features

• Adds new top-level workflow directive tests
• Define a list of tests that mock the output value of actions at runtime
• By default, all tests defined are enabled. You can control whether they're enabled or disabled at runtime.
• You can override any action with any data structure
• You can load mock data using fsspec compliant uris/paths
• Add custom headers module
• Pass --test (CLI) or X-Tracecat-Enable-Runtime-Tests: true` (http) to enable runtime action tests
• At execution time, for incoming webhooks we check for X-Tracecat-Enable-Runtime-Tests header and set DSLConfig in the workflow input. Otherwise, this config can be statically configured in the config directive.

Testing

• Added new tests
• All unit tests passing