Add Everbridge for contact point

I am looking to have the built-in alert manager within grafana send to the everbridge endpoint, but due to the issue here:
https://community.grafana.com/t/alerting-webhook-contact-point-authorization-header/73220, I am unable to do so because of custom headers. I see the following PR has been open for a long while and hasn't merged in. this could also work but there's no OOTB solution for me to send to this endpoint currently. https://github.com/grafana/alerting/pull/135.

How can I best request the ability to either increase the flexibility of the web hook contact point, or add an additional one?

Cheers!

Start by reviewing the existing webhook contact point and the linked alerting/pull/135, along with the reported custom-header limitation in the community discussion. Clarify whether the intended outcome is more flexible webhook authorization or a dedicated Everbridge contact point; done should mean Grafana's built-in alert manager can send to the Everbridge endpoint.

Written by the indexing model from the issue text.