Toolkit: Deprecate plugin:bundle-managed command and move its functionality to a bash script. (#57719)

* Toolkit: Deprecate `plugin:bundle-managed` command

* Replace yarn script with bash command

packages/grafana-toolkit/src/cli/index.ts

@@ -223,6 +223,9 @@ export const run = (includeInternalScripts = false) => {
     .command('plugin:bundle-managed')
     .description('Builds managed plugins')
     .action(async (cmd) => {
+      chalk.yellow.bold(
+        `⚠️ This command is deprecated and will be removed in v10. No further support will be provided. ⚠️`
+      );
       await execTask(bundleManagedTask)({});
     });