Auto merge of #153521 - Zalathar:predicates-of, r=nnethercote

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 rust-lang/rust#153487 (comment)

Author: bors