logUnsafeErrors() logs way too much data

I have had some trouble trying to view GraphQL errors for some queries I'm using. The relevant section of `Executor::logUnsafeErrors()` is here:

```php
\Drupal::logger('graphql')->error(
"There were errors during a GraphQL execution.\nOperation details:\n

\n{details}\n

\nPrevious errors:\n

\n{previous}\n

",
[
'details' => json_encode([
'$operation' => $operation,
// Do not pass $result to json_encode because it implements
// JsonSerializable and strips some data out during the
// serialization.
'$result->data' => $result->data,
'$result->errors' => $result->errors,
'$result->extensions' => $result->extensions,
], JSON_PRETTY_PRINT),
'previous' => implode('\n\n', $previousErrors),
]
```

`$result->data` contains the entire result set of the query. In my case, my queries are returning a couple hundred objects with lots of data and properties. If a single item causes an error, then the log message still will contain hundreds of items.

Is there a way to have my queries still return the data, yet have the error log messages omit or truncate the data? I had to set my PHP memory_limit higher just to view my site's Recent Log Messages for GraphQL.