Dogfood monitoring module to 1.9.0 and set mysql_tls_config = true (#40355)

- Monitoring module version updated to tf-mod-addon-monitoring-v1.9.0
- `mysql_tls_config` set to `true`

infrastructure/dogfood/terraform/aws-tf-module/main.tf

@@ -515,7 +515,7 @@ module "osquery-carve" {
 }
 
 module "monitoring" {
-  source                 = "github.com/fleetdm/fleet-terraform//addons/monitoring?ref=tf-mod-addon-monitoring-v1.8.0"
+  source                 = "github.com/fleetdm/fleet-terraform//addons/monitoring?ref=tf-mod-addon-monitoring-v1.9.0"
   customer_prefix        = local.customer
   fleet_ecs_service_name = module.main.byo-vpc.byo-db.byo-ecs.service.name
   albs = [
@@ -552,6 +552,7 @@ module "monitoring" {
     mysql_database             = module.main.byo-vpc.rds.cluster_database_name
     mysql_user                 = module.main.byo-vpc.rds.cluster_master_username
     mysql_password_secret_name = "${local.customer}-database-password"
+    mysql_tls_config           = "true"
     rds_security_group_id      = module.main.byo-vpc.rds.security_group_id
     subnet_ids                 = module.main.vpc.private_subnets
     vpc_id                     = module.main.vpc.vpc_id