feat(grafana): add Pyroscope datasource

Signed-off-by: Raito Bezarius <masterancpp@gmail.com>

services/monitoring/lgtm/grafana.nix

@@ -116,6 +116,13 @@ in
                   implementation = "mimir";
                 };
               }
+              {
+                name = "Pyroscope";
+                type = "pyroscope";
+                uid = "pyroscope";
+                access = "proxy";
+                url = "http://127.0.0.1:4040";
+              }
             ];
           };
         };