s3 management: add user management

[ctheune]

• accounting now uses the command runner utility code

• s3 users are now managed (created, deleted and updated)

Re PL-133084

@flyingcircusio/release-managers

Release process

• Created changelog entry using ./changelog.sh

PR release workflow (internal)

• PR has internal ticket
• internal issue ID (PL-…) part of branch name
• internal issue ID mentioned in PR description text
• ticket is on Platform agile board
• ticket state set to Pull request ready
• if ticket is more urgent than within the next few days, directly contact a member of the Platform team

Design notes

• Provide a feature toggle if the change might need to be adjusted/reverted quickly depending on context. Consider whether the default should be on or off. Example: rate limiting.

nope

• All customer-facing features and (NixOS) options need to be discoverable from documentation. Add or update relevant documentation such that hosted and guided customers can understand it as well.

yeah, this is still needed

Security implications

• Security requirements defined? (WHERE)

mostly data consistency, specifically: avoid deleting customer data. we do this by leveraging the 'staged deletion' procotol with prepare/soft/hard tombstones.

• Security requirements tested? (EVIDENCE)

added automated tests and performed manual tests

[osnyx]

tests.kvm_host_ceph-nautilus-nautilus is failing reproducibly.