snapper: update to 0.9.0

[folliehiyuki]

General

• This is a new package and it conforms to the quality requirements

Have the results of the proposed changes been tested?

• I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
• I generally don't use the affected packages but briefly tested this PR

We probably should wait for #29547 to be merged first.

[folliehiyuki]

Technically not a WIP, I put it there with intention to wait for btrfs-progs :)
Some of the locale tests ran on musl while failing on glibc, so I just disable them all.

[Piraty]

thanks for adopting it!

[folliehiyuki]

@Piraty does this work with our current btrfs-progs 5.9? I run 5.11.1 already so I couldn't test

[Piraty]

I did not test this as I assumed you (as new maintainer) would have noted otherwise.
(you can downgrade though)

[folliehiyuki]

Yes sorry about that.
I did downgrade for a few hours to test the commands and the cron jobs. But I moved back to 5.11.1 after that. I already noted above that we probably should wait, as I don't trust myself that much with those few hours. Though I can confirm the cron jobs and the commands works as expected.

[Piraty]

oh I'm sorry, my bad really! i didn't spot the cross-reference to the btrfs-progs PR in the top post.
let's keep as is now and revert only if necessary