atc: behavior: dont reuse resource type containers
atc: behavior: dont reuse resource type containers

this isn't really necessary, since these should almost always just be
`registry-image`, which has nothing to cache.

this actually wasn't meant to be committed - the tests only cover
resource checking. (hence there being no tests to update here.)

Signed-off-by: Alex Suraci <925ba519bbf1a06224928b692ef88b93aee946af@gmail.com>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse