Since #9059 the shared test archives and debug binaries are named
with the run attempt, and the archive identity binds the attempt. A
"Re-run failed jobs" attempt does not rerun the successful producer,
so its consumers look for <name>-2, fail with "Artifact not found",
and every flaky test forces a full rerun.
Give those artifacts one name per run, overwrite them when a producer
does rerun, and bind the archive identity to the run instead of the
attempt. Source, tree, lock, toolchain and environment stay bound, and
an archive from another run is still rejected.
The planned package list is passed to cargo as bare -p names. The zstd
compat crate is named zstd so it can patch crates.io, and with zstd
0.14.3 also locked, cargo rejects -p zstd as ambiguous, failing
Workspace Lint and Build on main since #9059.
Qualify such names with the local version from Cargo.lock, and fail
loudly if even that cannot disambiguate.
Chris An