075ecdac5b
Before this PR we platformtests in CI only against the ZFS version that shipped with the CircleCI machine image (ZFS 2.2). Changes in this PR: - add an `command` for building OpenZFS `.deb`'s from a Git checkout, and for caching those `.deb`s in CircleCI - use that command in the platform test build matrix. ZFS versions: **2.2.9**, **2.3.5**, and **2.4.0** --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>