df: Add a mount_dev_id to use id's instead of paths

[van-sprundel]

I thought this would be an easier fix, but there's a lot that I did not understand from system file mounts. For example, what "over mounting" is and when a file system is over mounted.

ramones@fedora:~/git/coreutils$ diff <(df --all 2>/dev/null | sort) <(./target/release/df --all 2>/dev/null | sort) | head -20
20,21d19
< nsfs                   -         -         -    - /run/docker/netns/f28327792c0d
< overlay                -         -         -    - /var/lib/docker/overlay2/852ac0d36c2d3d13e4bcf9aad8d58cbb182c2b3ba289671e36138b7ce86ed7c2/merged
27c25
< systemd-1              -         -         -    - /proc/sys/fs/binfmt_misc
---
> systemd-1              0         0         0    - /proc/sys/fs/binfmt_misc
ramones@fedora:~/git/coreutils$ ./target/release/df --all 2>/dev/null | grep binfmt_misc
systemd-1              0         0         0    - /proc/sys/fs/binfmt_misc
binfmt_misc            0         0         0    - /proc/sys/fs/binfmt_misc

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/df/over-mount-device. tests/df/over-mount-device is passing on 'main'. Maybe you have to rebase?
Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/df/over-mount-device. tests/df/over-mount-device is passing on 'main'. Maybe you have to rebase?

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/df/over-mount-device. tests/df/over-mount-device is passing on 'main'. Maybe you have to rebase?

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/df/over-mount-device. tests/df/over-mount-device is passing on 'main'. Maybe you have to rebase?
Note: The gnu test tests/tail/tail-n0f is now being skipped but was previously passing.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/shuf/shuf-reservoir (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/sort/sort-stale-thread-mem (fails in this run but passes in the 'main' branch)

[van-sprundel]

Seems like this test keeps failing due to no space left when cleaning up. Not sure if I can do something about this

https://github.com/uutils/coreutils/actions/runs/20926906984/job/60127207847

ah its not just me

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)