chore: Migrate gsutil usage to gcloud storage (#10219)

* chore: Migrate gsutil usage to gcloud storage

* Update README.md

* Update README.md

* Update README.md

Author: gurusai-voleti

flexible/java-11/cloudstorage/README.md

@@ -18,15 +18,15 @@ Before you can run or deploy the sample, you will need to do the following:
    SDK](https://cloud.google.com/sdk) using the following command:
 
   ```sh
-  gsutil mb gs://[your-bucket-name]
+  gcloud storage buckets create gs://[your-bucket-name]
   ```
 
 1. Set the default ACL on your bucket to public read in order to serve files
    directly from Cloud Storage. You can do this with the [Google Cloud
    SDK](https://cloud.google.com/sdk) using the following command:
 
   ```sh
-  gsutil defacl set public-read gs://[your-bucket-name]
+  gcloud storage buckets update gs://[your-bucket-name] --predefined-default-object-acl=publicRead
   ```
 
 1. Update the bucket name in `src/main/appengine/app.yaml`. This makes the

flexible/java-17/cloudstorage/README.md

@@ -18,15 +18,15 @@ Before you can run or deploy the sample, you will need to do the following:
    SDK](https://cloud.google.com/sdk) using the following command:
 
   ```sh
-  gsutil mb gs://[your-bucket-name]
+  gcloud storage buckets create gs://[your-bucket-name]
   ```
 
 1. Set the default ACL on your bucket to public read in order to serve files
    directly from Cloud Storage. You can do this with the [Google Cloud
    SDK](https://cloud.google.com/sdk) using the following command:
 
   ```sh
-  gsutil defacl set public-read gs://[your-bucket-name]
+  gcloud storage buckets update gs://[your-bucket-name] --predefined-default-object-acl=publicRead
   ```
 
 1. Update the bucket name in `src/main/appengine/app.yaml`. This makes the

flexible/java-8/cloudstorage/README.md

@@ -12,12 +12,12 @@ Before you can run or deploy the sample, you will need to do the following:
 2. Create a Cloud Storage Bucket. You can do this with the [Google Cloud SDK](https://cloud.google.com/sdk) using the following command:
 
   ```
-  $ gsutil mb gs://[your-bucket-name]
+  $ gcloud storage buckets create gs://[your-bucket-name]
   ```
 3. Set the default ACL on your bucket to public read in order to serve files directly from Cloud Storage. You can do this with the [Google Cloud SDK](https://cloud.google.com/sdk) using the following command:
 
   ```
-  $ gsutil defacl set public-read gs://[your-bucket-name]
+  $ gcloud storage buckets update gs://[your-bucket-name] --predefined-default-object-acl=publicRead
   ```
 4. Update the bucket name in `src/main/appengine/app.yaml`. This makes the bucket name an environment variable in deployment. You still need to set the environment variable when running locally, as shown below.