Don't use incremental disk-cache for query `predicates_of` The `predicates_of` query is a relatively modest wrapper around a few underlying queries that are themselves cached to disk. Removing the additional layer of disk caching appears to be a significant perf win. This query also appears to be the only query that uses a crate-local `cache_on_disk_if` condition, without also using the `separate_provide_extern` modifier. - Discovered via https://github.com/rust-lang/rust/pull/153487#discussion_r2895304051