[Shipping 10.23.20] add webhook config REST API (#16144)

* add webhook config REST API

* add versioning for dotcom/2.23+

* check for empty parameters with request bodies

* add latest rest-api-operation module

* Apply suggestions from code review

Co-authored-by: jmarlena <6732600+jmarlena@users.noreply.github.com>

content/developers/webhooks-and-events/creating-webhooks.md

@@ -14,6 +14,9 @@ Now that we understand [the basics of webhooks][webhooks-overview], let's go thr
 
 Creating a webhook is a two-step process. You'll first need to set up how you want your webhook to behave through {% data variables.product.product_name %}--what events should it listen to. After that, you'll set up your server to receive and manage the payload.
 
+
+{% data reusables.webhooks.webhooks-rest-api-links %}
+
 ### Setting up a Webhook
 
 You can install webhooks on an organization or on a specific repository.

content/developers/webhooks-and-events/securing-your-webhooks.md

@@ -12,6 +12,7 @@ versions:
 
 Once your server is configured to receive payloads, it'll listen for any payload sent to the endpoint you configured. For security reasons, you probably want to limit requests to those coming from GitHub. There are a few ways to go about this--for example, you could opt to allow requests from GitHub's IP address--but a far easier method is to set up a secret token and validate the information.
 
+{% data reusables.webhooks.webhooks-rest-api-links %}
 
 ### Setting your secret token