The effective_replication_map_ptr passed to
`create_write_response_handler` by `send_batchlog_mutation`
must be synchronized with the one used to calculate
_batchlog_endpoints to ensure they use the same topology.
Fixes scylladb/scylladb#15147
Closes#15149
* github.com:scylladb/scylladb:
storage_proxy: mutate_atomically_result: carry effective_replication_map down to create_write_response_handler
storage_proxy: mutate_atomically_result: keep schema of batchlog mutation in context