Disable containerd snapshotter

[ZephireNZ]

Summary

Disabled containerd-snapshotter which was causing errors in integration tests:

Warning: Exporting to docker daemon (building without --publish) and daemon uses containerd storage; performance may be significantly degraded.
        For more information, see https://github.com/buildpacks/pack/issues/2272.
        Warning: Builder is trusted but additional modules were added; using the untrusted (5 phases) build flow
        ERROR: failed to build: failed to fetch base layers: open /home/runner/work/_temp/imgutil.local.image.1754475079/blobs/sha256/c3285f7f47002f3a3a4b7a401e820b6d9858b161af50ece083af50fa66bffbeb: no such file or directory

This is likely due to the version of Docker being updated in the GitHub runner image.

Use Cases

Checklist

• I have viewed, signed, and submitted the Contributor License Agreement.
• I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• I have added an integration test, if necessary.
• I have reviewed the styleguide for guidance on my code quality.
• I'm happy with the commit history on this PR (I have rebased/squashed as needed).