lsp: Pass back diagnostic .data when querying code actions for it (#14962)

Per the LSP spec, we should pass .data field of diagnostics into code
action request:
```
	/**
	 * A data entry field that is preserved between a
	 * `textDocument/publishDiagnostics` notification and
	 * `textDocument/codeAction` request. *
	 * @since 3.16.0 */ data?: LSPAny;
```


Release Notes:

- Fixed rare cases where a code action triggered by diagnostic may not
be available for use.

crates/language/src/diagnostic_set.rs

@@ -69,6 +69,7 @@ impl DiagnosticEntry<PointUtf16> {
             severity: Some(self.diagnostic.severity),
             source: self.diagnostic.source.clone(),
             message: self.diagnostic.message.clone(),
+            data: self.diagnostic.data.clone(),
             ..Default::default()
         }
     }