Create a GitHub action that creates a push subscription to event handler function

[cortadocodes]

Feature request

Use Case

We'd like to be able to stream all question events to BigQuery via a cloud function to support asynchronous questions.

Current state

No data is stored for questions after they've been processed, restricting us to synchronous questions.

Proposed Solution

Create a GitHub action that creates a push subscription to a cloud function to process then store service usage events.