Allow to temporarily disable WAL archiving #415
Description
To reduce the storage size and time needed when importing large amounts of data, especially during database migratinos, it should be possible to temporarily disable the archiving of wals.
A similar thing was proposed to the operator here, but was ultimately supercede by the generic approach of defining pod environment variables within the custom resource.
So we could introduce a new field to our CR called disableWALG, which would in turn cause the postgreslet to override the WALG_S3_BUCKET Environment Variable in the postgresql.acid.zalan.do custom resource.
Additionally, it was proposed to also set numberOfInstances to 1 and set synchronous_commit to false.