Merge: cgroup: Remove steal time from usage_usec

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/6423

JIRA: https://issues.redhat.com/browse/RHEL-79933



commit db5fd3cf8bf41b84b577b8ad5234ea95f327c9be
Author: Muhammad Adeel <Muhammad.Adeel@ibm.com>
Date:   Fri, 7 Feb 2025 14:24:32 +0000

    cgroup: Remove steal time from usage_usec

    The CPU usage time is the time when user, system or both are using the CPU.
    Steal time is the time when CPU is waiting to be run by the Hypervisor. It
    should not be added to the CPU usage time, hence removing it from the
    usage_usec entry.

    Fixes: 936f2a70 ("cgroup: add cpu.stat file to root cgroup")
Acked-by: Axel Busch <axel.busch@ibm.com>
Acked-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Muhammad Adeel <muhammad.adeel@ibm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

Signed-off-by: Waiman Long <longman@redhat.com>

Approved-by: Thomas Huth <thuth@redhat.com>
Approved-by: Radostin Stoyanov <rstoyano@redhat.com>
Approved-by: Phil Auld <pauld@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Augusto Caringi <acaringi@redhat.com>