Display webhook URL on external services page (!10634) · Merge requests · Administrator / sourcegraph

Created by: eseliger

This PR:

Adds quick actions for GitHub and Bitbucket Server to add webhooks to the config
Displays the webhook info box as shown in the screenshot below
Stays on the page after creating the external service, so the user is not navigated away from the derived information
Fixes retrieving the config for external services other than GitHub and Bitbucket server cc @ryanslade https://github.com/sourcegraph/sourcegraph/commit/cf003e015b46abc958733fe9ab7e61d809b3e422 Hence, I marked as release blocking
Fixes detection of code host types

Closes #10300

ping @ryanslade

Display webhook URL on external services page