chore: add template toggle to disable module caching (#21931)

There exists use cases to disable the new module caching behavior of
workspace builds. This was the legacy behavior.

coderd/database/queries/templates.sql

@@ -173,7 +173,8 @@ SET
 	group_acl = $8,
 	max_port_sharing_level = $9,
 	use_classic_parameter_flow = $10,
-	cors_behavior = $11
+	cors_behavior = $11,
+	disable_module_cache = $12
 WHERE
 	id = $1
 ;