chore: pass flavor to vscode flutter codelens (#19919)

.vscode/launch.json

@@ -18,6 +18,25 @@
       "name": "Immich Workers",
       "remoteRoot": "/usr/src/app",
       "localRoot": "${workspaceFolder}/server"
+    },
+    {
+      "name": "Flavor - Production",
+      "request": "launch",
+      "type": "dart",
+      "codeLens": {
+        "for": [
+          "run-test",
+          "run-test-file",
+          "run-file",
+          "debug-test",
+          "debug-test-file",
+          "debug-file",
+        ],
+        "title": "${debugType}",
+      },
+      "args": [
+        "--flavor", "production"
+      ],
     }
   ]
 }