[8.12] [CIS GCP] Notify the user about cloud shell editor deprecation (backport #5031)

docs/cloud-native-security/cspm-get-started-gcp.asciidoc

@@ -59,8 +59,15 @@ For most users, the simplest option is to use a Google Cloud Shell script to aut
 +
 image::images/cspm-cloudshell-trust.png[The cloud shell confirmation popup]
 +
+NOTE: Google has deprecated its old Cloud Shell editor. If you continue to use it, you may encounter the following message:
++
+image::images/cspm-cloudshell-old-editor.png[The cloud shell switch editor popup]
++
+If the message appears, click **X** or **Try the new Editor** and follow the next steps. When you switch to the new editor, your context should remain unchanged.
 . In Google Cloud Shell, execute the command you copied. Once it finishes, return to {kib} and wait for the confirmation of data received from your new integration. Then you can click **View Assets** to see your data.
 
+NOTE: If you encounter any issues running the command, return to {kib} and navigate again to Google Cloud Shell.
+
 NOTE: During Cloud Shell setup, the CSPM integration adds roles to Google's default service account, which enables custom role creation and attachment of the service account to a compute instance.
 After setup, these roles are removed from the service account. If you attempt to delete the deployment but find the deployment manager lacks necessary permissions, consider adding the missing roles to the service account:
 https://cloud.google.com/iam/docs/understanding-roles#resourcemanager.projectIamAdmin[Project IAM Admin], https://cloud.google.com/iam/docs/understanding-roles#iam.roleAdmin[Role Administrator].