Bump ProxySQL to 3.0.x and enable DB TLS

Author: seunghun1ee

etc/kayobe/kolla/globals.yml

@@ -61,7 +61,7 @@ prometheus_openstack_exporter_interval: "{{ stackhpc_prometheus_openstack_export
 
 rabbitmq_image: "{% raw %}{{ docker_registry ~ '/' if docker_registry else '' }}{{ docker_namespace }}/rabbitmq-4-1{% endraw %}"
 
-# NOTE(seunghun1ee) Disable database TLS until ProxySQL 2.7 gets bug fix for
-# https://github.com/sysown/proxysql/issues/4877 or K-A bumps ProxySQL to 3.x.
-database_enable_tls_internal: false
-database_enable_tls_backend: false
+# Using ProxySQL 3.0.x to fix bug https://github.com/sysown/proxysql/issues/4877
+proxysql_version: 3
+database_enable_tls_internal: true
+database_enable_tls_backend: true