Update MinIO configuration

Add new pool to extend the MinIO capacity

The old pool pool-0 can't be removed as the operator uses the pool index to match settings and pool-monitoring would become pool #0 and would break existing installations

pool-monitoring has 75% storage efficiency and provides ~120GiB additional storage, bringing the total to ~130GiB which is 11 times more than the previous setup

This is a temporary fix so we don't get that many issues in dev environments. We'll need to look at better options for managing the storage expansions (maybe use plain MinIO chart instead of the Operator setup)

Several related issues for MinIO: e.g. #1251 (closed)