This is the subset of incremental tests that have a FIXME to consider migrating
to check-pass instead.
That migration is beyond the scope of this PR, but might be attempted later.
Long ago, UI tests were divided into "compile" and "run" tests. Later, the
compile tests were further subdivided into "check" and "build" tests, to speed
up tests that don't need a full build.
The same split was never applied to incremental test revisions, so the only way
to perform a check build in incremental tests is (confusingly) to use a `cfail`
revision and then specify `//@ check-fail` or `//@ check-pass`.
This PR makes room for dedicated check-fail and check-pass revisions by
renaming the existing `cfail` and `cpass` revisions to `bfail` and `bpass`,
since they currently perform a full build.
The query accept arbitrary DefIds, not just owner DefIds.
The return can be an `Option` because if there are no nodes, then it doesn't matter whether it's due to NonOwner or Phantom.
Also rename the query to `opt_hir_owner_nodes`.
Zalathar