Store pulled diagnostics' result_ids more persistently (#32403)

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

`BufferId` can change between file reopens: e.g. open the buffer, close
it, go back in history to reopen it — the 2nd one will have a different
`BufferId`, but the same `result_ids` semantically.

Release Notes:

- N/A

crates/project/src/lsp_command.rs

@@ -4050,7 +4050,7 @@ impl LspCommand for GetDocumentDiagnostics {
         let buffer_id = buffer.update(&mut cx, |buffer, _| buffer.remote_id())?;
         Ok(Self {
             previous_result_id: lsp_store
-                .update(&mut cx, |lsp_store, _| lsp_store.result_id(buffer_id))?,
+                .update(&mut cx, |lsp_store, cx| lsp_store.result_id(buffer_id, cx))?,
         })
     }