Bootc status without sysroot lock

When an automated upgrade is happening in the background, you are unable to query `bootc status` to see information about the current deployment (or to see the upgrade is in progress), since status requires a sysroot lock. I would expect such read-only commands (I can only think of status for now) to not require a system lock, and display the regular output regardless of whether another process is happening.

This could cause some confusion when you're blocked from seeing information about your system due to a command that's invoked without the user saying to do so.

If there's some context I am missing or a technical limitation, I'm more than happy for you to say "this is expected" and close this.