Fix du command to be portable (#95172)

[ncopa]

The -B 1 argument is not defiend in POSIX du1 and does not work with
busybox du. Fix this by using -k and append "Ki" for the ParseQuantity
call.

resource.ParseQuantity() will set the format to BinarySI when there
is a "Ki" suffix so we can remove the explicit set of the format.

Signed-off-by: Natanael Copa ncopa@mirantis.com

What type of PR is this?
/kind bug

What this PR does / why we need it:

Makes kubernetes work with busybox du used on Alpine Linux without depending on GNU coreutils du implementaion.

Which issue(s) this PR fixes:
Fixes #95172

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

- [Other doc]: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/du.html

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[k8s-ci-robot]

Hi @ncopa. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[ncopa]

I signed it

[ncopa]

/ok-to-test

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ncopa
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[ncopa]

/assign @saad-ali

[ncopa]

I think it would make sense to replace both du and find (#95189) with pure go at the same time, similar to what was done in
google/cadvisor@046818d#diff-c7b54bb28e1654d0ca47364a2c97456c124ee0d3a65854db18d116c509d89136

[ncopa]

I am closing this in favor of #96115