Updated API Code Samples (#24141)

* api: remove PHP code samples

* api: remove Curl code samples

* api: remove Go code samples

* link out to marketplace exclusively for community-built drivers

* absolute path to V4_SRC

* programmatically extract x-codeSamples

* initial batch of examples

* Update api/server/main.go

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

* Update api/server/main.go

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

* Update api/server/main.go

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

* updated examples

---------

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

api/v4/source/introduction.yaml

@@ -61,15 +61,9 @@ tags:
 
       * [Mattermost Golang Driver](https://github.com/mattermost/mattermost/blob/master/server/public/model/client4.go)
 
-
       #### Community-built Drivers
 
-      * [PHP Driver](https://github.com/gnello/php-mattermost-driver) - built by [@gnello](https://github.com/gnello) and [@prixone](https://github.com/prixone)
-
-      * [Python Driver](https://github.com/Vaelor/python-mattermost-driver) - built by [@Vaelor](https://github.com/Vaelor)
-
-
-      For other community-built drivers and API wrappers, see [our app directory](https://mattermost.com/marketplace/).
+      For community-built drivers and API wrappers, see [our app directory](https://mattermost.com/marketplace/).
   - name: authentication
     description: >
       There are multiple ways to authenticate against the Mattermost API.