New webhook for event ingested

[mnida]

Is your feature request related to a problem? Please describe.
Some customers want to process events on their own ledger or do something every time a specific event is received.

Describe the solution you'd like
A new webhook that sends the event data when a specific event is ingested. It doesn't have to do with the metrics, therefore, it could be an alert, but it should probably just be a new webhook that has an option of what event_name to subscribe to. Having this alert at the component level doesn't make much sense.

This will require work in the backend mostly, with Svix and will require some frontend work to add the webhook option but also some sort of design that allows the user to choose event_name filter for the webhook.

Additional context
This will be a high throughput webhook, so we can do some QA after this is complete.