Support AD in cluster connection dialog (#7367)

- Use token API to get auth token before using other endpoints. Note this needs server updates before it'll work as expected (will only checkin after verifying this)
- Add auth option in controller UI and plumb through connection save, load, and uses of the controller API
Because the swagger spec is split in 2 created new file for the 2nd swagger spec including token auth endpoints. These come from a running cluster and instructions were updated to reflect this.

New UI Changes:
- Added authentication type field with "Basic" and "Windows Authentication" as the options
- Moved error notifications to the dialog instead of separate notification window. That's the recommended pattern
- Username / password aren't required for Windows Authentication. I couldn't find a way to change required status in form container on switching from Windows => Basic Auth so have error show on clicking OK. 
- Controller URL should use ":" not "," for IP:Port

extensions/big-data-cluster/src/bigDataCluster/utils.ts

@@ -59,9 +59,10 @@ export function showErrorMessage(error: any, prefixText?: string): void {
 		if (typeof error === 'string') {
 			text += error as string;
 		} else if (typeof error === 'object' && error !== null) {
-			let message = error.message;
-			let code = error.code || error.errno;
-			text += `${message}${code ? ` (${code})` : ''}`;
+			text += error.message;
+			if (error.code && error.code > 0) {
+				text += ` (${error.code})`;
+			}
 		} else {
 			text += `${error}`;
 		}