Deleting records doesn't cause deleting remote segments

[ivanyu]

1. Create a topic with tiered storage.
2. Fill the topic with some data and wait until segments are uploaded.
3. Use kafka-delete-records.sh to delete e.g. a half of the data.
4. Observe that neither eligible segments are removed from the remote tier nor there are relevant new records in __remote_log_metadata.

org.apache.kafka.server.log.remote.storage.LocalTieredStorage as the RSM is enough to reproduce.