[FEATURE] Implement an SLA Miss Sensor for workflows

[chaelant]

Is your feature request related to a problem? Please describe.
Currently, brickflow has a health argument in the Workflow class that sets up an alert to trigger when a workflow exceeds a specified duration. This feature would add a sensor that allows users to specify a time by which the workflow is expected to be completed based on consumer service level agreements.

Cloud Information

• AWS
• Azure
• GCP
• Other

Describe the solution you'd like
A sensor task that monitors a given workflow's final task and sends an alert if that task has not completed by a user-specified time

Describe alternatives you've considered
We've considered just using the health rules, but those cannot be configured dynamically such that the duration is set for the amount of time between the workflow starting and the expected end time. (e.g. a workflow that's expected to complete within 2 hours will always have the same expected duration. if it needs to complete by 10am and starts at 9am, there's no way to dynamically adapt the duration down to one hour).

Additional context