Pull diagnostics fixes (#32242)

Follow-up of https://github.com/zed-industries/zed/pull/19230

* starts to send `result_id` in pull requests to allow servers to reply
with non-full results
* fixes a bug where disk-based diagnostics were offset after pulling the
diagnostics
* fixes a bug due to which pull diagnostics could not be disabled
* uses better names and comments for the workspace pull diagnostics part

Release Notes:

- N/A

crates/collab/src/rpc.rs

@@ -356,7 +356,7 @@ impl Server {
             .add_message_handler(broadcast_project_message_from_host::<proto::BufferSaved>)
             .add_message_handler(broadcast_project_message_from_host::<proto::UpdateDiffBases>)
             .add_message_handler(
-                broadcast_project_message_from_host::<proto::RefreshDocumentsDiagnostics>,
+                broadcast_project_message_from_host::<proto::PullWorkspaceDiagnostics>,
             )
             .add_request_handler(get_users)
             .add_request_handler(fuzzy_search_users)