Update CSQL create command.

PiperOrigin-RevId: 838913413

Author: bvliu

perfkitbenchmarker/providers/gcp/gcp_relational_db.py

@@ -212,8 +212,7 @@ class GCPRelationalDb(relational_db.BaseRelationalDb):
 
   This class contains logic required to provision and teardown the database.
   Currently, the database will be open to the world (0.0.0.0/0) which is not
-  ideal; however, a password is still required to connect. Currently only
-  MySQL 5.7 and Postgres 9.6 are supported.
+  ideal; however, a password is still required to connect.
   """
 
   CLOUD = provider_info.GCP
@@ -298,12 +297,11 @@ def _CreateGcloudSqlInstance(self):
       cmd_string.append('--no-backup')
     cmd = util.GcloudCommand(*cmd_string)
     cmd.flags['project'] = self.project
+    # Needed for labels and allocated-ip-range-name
     cmd.use_beta_gcloud = True
 
     if self.spec.db_tier:
       cmd.flags['edition'] = self.spec.db_tier
-      cmd.use_alpha_gcloud = True
-      cmd.use_beta_gcloud = False
       if relational_db.ENABLE_DATA_CACHE.value:
         cmd.flags['enable-data-cache'] = True
       else: