Database deletion is now skipped by default if the tenant has the
`create_database` internal attribute set to false, meaning it was likely
created without a database. This skip can be opted out of by changing a
static property.
It also adds an opt-in static property for ignoring any other failures
during database deletion, to allow continuing execution of the delete
pipeline.
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Co-authored-by: Samuel Štancl <samuel@archte.ch>