Fix formatting for kubelet memcg notification threshold

[dashpole]

/kind bug
What this PR does / why we need it:
This fixes the following errors (found in this node_e2e serial test log):
eviction_manager.go:256] eviction manager attempting to integrate with kernel memcg notification api
threshold_notifier_linux.go:70] eviction: setting notification threshold to 4828488Ki
eviction_manager.go:272] eviction manager: failed to create hard memory threshold notifier: invalid argument

Special notes for your reviewer:
This needs to be cherrypicked back to 1.10.
This regression was added in #60531, because the quantity being used was changed from a DecimalSI to BinarySI, which changes how it is printed out in the String() method. To make it more explicit that we want the value, just convert Value() to a string.

Release note:

Fix memory cgroup notifications, and reduce associated log spam.

[dashpole]

/sig node
/assign @dchen1107

[dashpole]

cc @derekwaynecarr

[dashpole]

/priority important-soon

[dashpole]

/retest

[feiskyer]

/lgtm

[k8s-github-robot]

[MILESTONENOTIFIER] Milestone Removed From Pull Request

@dashpole @dchen1107 @feiskyer @kubernetes/sig-node-misc

Important: This pull request was missing the status/approved-for-milestone label for more than 7 days.

Help

• Additional instructions
• Commands for setting labels

[dashpole]

/assign @vishh
for approval

[vishh]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dashpole, feiskyer, vishh

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/kubelet/eviction/OWNERS [vishh]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[k8s-github-robot]

/test all [submit-queue is verifying that this PR is safe to merge]

[k8s-github-robot]

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions here.