[sentry] Out of disk space

Due to an out of disk space outage, the sentry service is down

root@riverside:/var/lib/sentry-onpremise# df -h /
Filesystem                      Size  Used Avail Use% Mounted on
/dev/mapper/riverside--vg-root  125G  121G     0 100% /

It seems kafka is using most of the disk space:

root@riverside:/var/lib/docker/volumes# du -sch * | sort -h | tail -n 5
31M	sentry-redis
933M	sentry_onpremise_sentry-clickhouse-log
7.6G	sentry-clickhouse
73G	sentry-kafka
82G	total

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Migrated from T4497 (view on Phabricator)