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/diagnostics/src/diagnostics_tests.rs

@@ -954,6 +954,7 @@ fn random_diagnostic(
             is_primary,
             is_disk_based: false,
             is_unnecessary: false,
+            data: None,
         },
     }
 }