Closes https://github.com/apple/container/issues/1687
The default kernel archive is downloaded from a remote release URL
during first-run setup and via `container system kernel set
--recommended`. Previously, the archive contents were not verified after
download, so integrity depended on HTTPS and the release artifact
remaining unchanged.
This change adds digest verification for kernel archives. The
recommended/default kernel now has pinned digest metadata using an
algorithm-prefixed value such as `sha256:<hex>`. `container system
kernel set --tar` accepts `--digest`; remote tar URLs require it, and
local tar archives can also be verified before unpacking and
installation.
The system config also supports `kernel.digest`, and a custom
`kernel.url` must provide a digest for that archive.
- Part of #1833.
- CLI progress and registry test migrations were inadventently reverted
by #1857.
- Migrate TestCLINoParallelCases to TestCLIImagePruneSerial and
TestCLINetworkPruneSerial.
- Clean up test selection patterns in Makefile.
- Remove all legacy CLITests files.
- Use swift-testing `withKnownIssue` to run but ignore failures on flaky
`testCreateNameLongestValid` and `testIsolatedNetwork`.
- Extracts a fixture helper for tests requiring a retry loop.