Webhooks in Alerts: add host (POST method), head, JSON.

[aandrey5]

For several External APIs is needed to make a POST request with full additional attributes:

• host 'type text' (POST must be default, but wanted an ability to change method - PUT / GET)

• POST / PUT / GET 'radiobutton'

• head 'type text' (needed text area json format, such as

            head = {
                   "Authorization": "OAuth <text>",
                   "some_needed_attrs": "<text>"
               }

• JSON 'type text' for making a payload, such as

json = {
        "queue": "OMD",
        "summary": "Test Issue Direct Alert from OMD",
        "type": "bug",
        "assignee": "----",
        "attachmentIds": [],
        "boards": "542"
        }

---

Current version of OMD has only two attributes:

• host
• secret key
  that's not enough

Thread in support channel:
https://openmetadata.slack.com/archives/C02B6955S4S/p1726506390553779