chore: add 'classic_parameter_flow' column setting to templates (#17828)

We are forcing users to try the dynamic parameter experience first.
Currently this setting only comes into effect if an experiment is
enabled.

coderd/database/queries/templates.sql

@@ -124,7 +124,8 @@ SET
 	display_name = $6,
 	allow_user_cancel_workspace_jobs = $7,
 	group_acl = $8,
-	max_port_sharing_level = $9
+	max_port_sharing_level = $9,
+	use_classic_parameter_flow = $10
 WHERE
 	id = $1
 ;