only show new query when query is supported (#17346)

* only show new query when query is supported

* test case fix and pr comments

* rename context key

src/sql/platform/capabilities/common/capabilitiesService.ts

@@ -27,6 +27,7 @@ export interface ConnectionProviderProperties {
 	notebookKernelAlias?: string;
 	azureResource?: string;
 	connectionOptions: azdata.ConnectionOption[];
+	isQueryProvider?: boolean;
 }
 
 export interface ProviderFeatures {

src/sql/platform/capabilities/common/capabilitiesServiceImpl.ts

@@ -38,7 +38,8 @@ export class CapabilitiesService extends Disposable implements ICapabilitiesServ
 			};
 			this._providers.set(id, provider);
 		}
-
+		// By default isQueryProvider is true.
+		provider.connection.isQueryProvider = provider.connection.isQueryProvider !== false;
 		this._onCapabilitiesRegistered.fire({ id, features: provider });
 	}