When reading a very large kv( > 2G), there is a panic. pebble version: v0.0.0-20230928194634-aa077af62593 <img width="874" alt="image" src="https://github.com/cockroachdb/pebble/assets/16660938/1515bc6e-b169-4345-8ae3-6fce2e43e935"> Jira issue: PEBBLE-110