fix: handle cli.json copy upon pull to empty dir

Author: attilah

packages/amplify-provider-awscloudformation/src/attach-backend.js

@@ -258,8 +258,9 @@ async function downloadBackend(context, backendEnv, awsConfig) {
       absolute: true,
     });
     const amplifyDir = pathManager.getAmplifyDirPath();
+    const isPulling = context.input.command === 'pull' || (context.input.command === 'env' && context.input.subCommands[0] === 'pull');
 
-    if (context.exeInfo && context.exeInfo.restoreBackend) {
+    if ((context.exeInfo && context.exeInfo.restoreBackend) || isPulling) {
       // If backend must be restored then copy out the config files and overwrite existing ones.
       for (const cliJSONFilePath of cliJSONFiles) {
         const targetPath = path.join(amplifyDir, path.basename(cliJSONFilePath));