Revert "ci/valve: uprev boot2container"

This reverts commit 48243965.

The newest version of b2c has changed the mount point of the cache device, which is has proven to be working very well in my local testing, but ends up confusing podman when the cache device had been initialized using an older version of b2c. The end result is that we end up using tmpfs to run our jobs, and some machines just run out of RAM before the end of the job...

We'll be fixing this issue, cut a new b2c release, then re-introduce in Mesa.

Signed-off-by: Martin Roukala (né Peres) martin.roukala@mupuf.org