[v9.4.x] [feat] docs; update admonition syntax (#68855)

[feat] docs; update admonition syntax (#68842)

* [feat] docs; update admonition syntax

- Standardizes according to style conventions: https://grafana.com/docs/writers-toolkit/style-guide/style-conventions/#admonitions
- Prepares docs for better, uniform admonition style.

* Remove false positives and irregularities

* false positive removal

* Update docs/sources/datasources/mysql/_index.md

* Update docs/sources/developers/angular_deprecation/angular-plugins.md

* fix link errors

* Prettify some nested blockquotes

* remoe unnecessary admonition

(cherry picked from commit 1c4bb9ca00)

Co-authored-by: Matt Dodson <47385188+MattDodsonEnglish@users.noreply.github.com>

docs/sources/developers/http_api/licensing.md

@@ -61,7 +61,9 @@ Status codes:
 ## Add license
 
 {{% admonition type="note" %}}
-
+Available in Grafana Enterprise v7.4+.
+{{% /admonition %}}
+
 `POST /api/licensing/token`
 
 Applies a license to a Grafana instance.
@@ -121,7 +123,9 @@ Status Codes:
 
 | Action          | Scope |
 | --------------- | ----- |
-### Examples
+| licensing:write | n/a   |
+
+### Examples
 
 **Example request:**
 
@@ -180,7 +184,9 @@ Status Codes:
 Content-Type: application/json
 Authorization: Bearer eyJrIjoiT0tTcG1pUlY2RnVKZTFVaDFsNFZXdE9ZWmNrMkZYbk
 
-
+{"instance": "http://play.grafana.org/"}
+```
+
 JSON Body schema:
 
 - **instance** – Root URL for the instance for which the license should be deleted. Required.