Add Connectors and ML updates for 2.9

STYLE_GUIDE.md

@@ -43,7 +43,7 @@ Use lowercase when referring to features, unless you are referring to a formally
 * “*Remote-backed storage* is an experimental feature. Therefore, we do not recommend the use of *remote-backed storage* in a production environment.”
 * “You can take and restore *snapshots* using the snapshot API.”
 * “You can use the *VisBuilder* visualization type in OpenSearch Dashboards to create data visualizations by using a drag-and-drop gesture.” (You can refer to VisBuilder alone or qualify the term with “visualization type”.)
-* “As of OpenSearch 2.4, the *model-serving framework* only supports text embedding models without GPU acceleration.”
+* “As of OpenSearch 2.4, the *ML framework* only supports text embedding models without GPU acceleration.”
 
 #### Plugin names
 

_ml-commons-plugin/cluster-settings.md

@@ -292,6 +292,23 @@ plugins.ml_commons.enable_inhouse_python_model: false
 - Default value: false
 - Value range: [false, true]
 
+## Enable access control for connectors
+
+When set to `true`, requires an access key when making a connection to SageMaker or Hugging Face.
+
+### Setting
+
+```
+plugins.ml_commons.connector_access_control_enabled: true
+```
+
+###
+
+### Values
+
+- Default value: false
+- Value range: [false, true]
+