fix issue caused by execution plan provider (#21533)

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

@@ -56,6 +56,7 @@ export interface ConnectionProviderProperties {
 	azureResource?: string;
 	connectionOptions: azdata.ConnectionOption[];
 	isQueryProvider?: boolean;
+	isExecutionPlanProvider?: boolean;
 	supportedExecutionPlanFileExtensions?: string[];
 	connectionStringOptions?: ConnectionStringOptions;
 }