[Sharepoint Server] Add RCF for Authentication type (#189030)

## Summary

Related to elastic/connectors#2112. Adding a
new RCF for authentication type having options as Basic Auth and NTLM
Auth in the Sharepoint server connector.


### Checklist

Delete any items that are not applicable to this PR.

- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

---------

Co-authored-by: Artem Shelkovnikov <artem.shelkovnikov@elastic.co>
Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>

packages/kbn-search-connectors/types/native_connectors.ts

@@ -4662,6 +4662,45 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
   },
   sharepoint_server: {
     configuration: {
+      authentication: {
+        default_value: null,
+        depends_on: [],
+        display: DisplayType.DROPDOWN,
+        label: i18n.translate(
+          'searchConnectors.nativeConnectors.sharepoint_server.configuration.authentication',
+          {
+            defaultMessage: 'Authentication',
+          }
+        ),
+        options: [
+          {
+            label: i18n.translate(
+              'searchConnectors.nativeConnectors.sharepoint_server.options.basicLabel',
+              {
+                defaultMessage: 'Basic',
+              }
+            ),
+            value: 'basic_auth',
+          },
+          {
+            label: i18n.translate(
+              'searchConnectors.nativeConnectors.sharepoint_server.options.ntlmLabel',
+              {
+                defaultMessage: 'NTLM',
+              }
+            ),
+            value: 'ntlm_auth',
+          },
+        ],
+        order: 1,
+        required: true,
+        sensitive: false,
+        tooltip: null,
+        type: FieldType.STRING,
+        ui_restrictions: [],
+        validations: [],
+        value: 'basic_auth',
+      },
       username: {
         default_value: null,
         depends_on: [],
@@ -4673,7 +4712,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
           }
         ),
         options: [],
-        order: 1,
+        order: 2,
         required: true,
         sensitive: false,
         tooltip: '',
@@ -4693,7 +4732,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
           }
         ),
         options: [],
-        order: 2,
+        order: 3,
         required: true,
         sensitive: true,
         tooltip: '',
@@ -4713,7 +4752,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
           }
         ),
         options: [],
-        order: 3,
+        order: 4,
         required: true,
         sensitive: false,
         tooltip: '',
@@ -4733,7 +4772,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
           }
         ),
         options: [],
-        order: 4,
+        order: 5,
         required: true,
         sensitive: false,
         tooltip: '',
@@ -4748,7 +4787,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
         display: DisplayType.TOGGLE,
         label: ENABLE_SSL_LABEL,
         options: [],
-        order: 5,
+        order: 6,
         required: true,
         sensitive: false,
         tooltip: null,
@@ -4768,7 +4807,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
         display: DisplayType.TEXTBOX,
         label: SSL_CERTIFICATE_LABEL,
         options: [],
-        order: 6,
+        order: 7,
         required: true,
         sensitive: false,
         tooltip: null,
@@ -4783,7 +4822,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
         display: DisplayType.NUMERIC,
         label: RETRIES_PER_REQUEST_LABEL,
         options: [],
-        order: 7,
+        order: 8,
         required: false,
         sensitive: false,
         tooltip: null,
@@ -4798,7 +4837,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
         display: DisplayType.TOGGLE,
         label: USE_TEXT_EXTRACTION_SERVICE_LABEL,
         options: [],
-        order: 8,
+        order: 9,
         required: true,
         sensitive: false,
         tooltip: USE_TEXT_EXTRACTION_SERVICE_TOOLTIP,
@@ -4813,7 +4852,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
         display: DisplayType.TOGGLE,
         label: ENABLE_DOCUMENT_LEVEL_SECURITY_LABEL,
         options: [],
-        order: 9,
+        order: 10,
         required: true,
         sensitive: false,
         tooltip: getEnableDocumentLevelSecurityTooltip(
@@ -4842,7 +4881,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
           }
         ),
         options: [],
-        order: 10,
+        order: 11,
         required: true,
         sensitive: false,
         tooltip: i18n.translate(
@@ -4873,7 +4912,7 @@ export const NATIVE_CONNECTOR_DEFINITIONS: Record<string, NativeConnector | unde
           }
         ),
         options: [],
-        order: 11,
+        order: 12,
         required: true,
         sensitive: false,
         tooltip: i18n.translate(