module.nix: don't run with debug logging by default (move to test vm)

flake.nix

@@ -122,6 +122,8 @@
             enable = true;
             createLocalDatabaseUser = true;
           };
+
+          systemd.services."mysqladm@".environment.RUST_LOG = "debug";
         })
       ];
     };

nix/module.nix

@@ -98,7 +98,6 @@ in
 
     systemd.services."mysqladm@" = {
       description = "MySQL administration tool for non-admin users";
-      environment.RUST_LOG = "debug";
       restartTriggers = [ config.environment.etc."mysqladm/config.toml".source ];
       serviceConfig = {
         Type = "notify";