Add warnings when Renovate attempts to update packages that can be skewed

Author: aaliddell

.github/renovate.json

@@ -22,14 +22,25 @@
       "enabled": false
     },
     {
-      "description": "Group all grpc updates into one update",
+      "description": "Group all grpc updates into one update and ensure manual updates made",
       "matchPackageNames": ["grpc", "grpcio"],
-      "groupName": "grpc"
+      "groupName": "grpc",
+      "draftPR": true,
+      "prBodyNotes": "> [!CAUTION]\n> This PR is marked as draft, as some updates cannot be made automatically (e.g. Java Maven deps and Go deps)"
     },
     {
-      "description": "Group all protobuf updates into one update",
+      "description": "Ensure gRPC Gateway protoc plugins are updated in sync with Go deps",
+      "matchPackageNames": ["github.com/grpc-ecosystem/grpc-gateway/v2"],
+      "matchDatasources": ["go"],
+      "draftPR": true,
+      "prBodyNotes": "> [!CAUTION]\n> This PR is marked as draft, as the protoc plugins in modules/grpc-gateway/module_extensions.bzl need manual updating"
+    },
+    {
+      "description": "Group all protobuf updates into one update and ensure manual updates made",
       "matchPackageNames": ["protobuf"],
-      "groupName": "protobuf"
+      "groupName": "protobuf",
+      "draftPR": true,
+      "prBodyNotes": "> [!CAUTION]\n> This PR is marked as draft, as some updates cannot be made automatically (e.g. Java Maven deps and Go deps)"
     }
   ],
   "postUpdateOptions": ["gomodTidy"],