Fix EnvironmentFile path for kubeadm deb package

[xmudrii]

What type of PR is this?

/kind bug
/kind regression

What this PR does / why we need it:

Debian packages published to the legacy repos have EnvironmentFile in 10-kubeadm.conf set to /etc/default/kubelet. However, Debian packages published to pkgs.k8s.io have this variable set to /etc/sysconfig/kubelet

This is wrong as described in #3276 and https://kubernetes.slack.com/archives/C09NXKJKA/p1694790202990129

Moreover, this is breaking some clusters as described in #3219 (comment)

This PR is supposed to fix this issue by applying some sed magic when building packages ✨ 🧙

Which issue(s) this PR fixes:

Fixes #3276

Special notes for your reviewer:

I'll properly test this change after the PR is merged because I can't run a nomock job on a non-master branch. This fix only applies on packages published after the fix is merged, we don't have a way to alter existing packages.

/priority critical-urgent

Does this PR introduce a user-facing change?

EnvironmentFile is changed from `/etc/sysconfig/kubelet` to `/etc/default/kubelet` for `kubeadm` Debian packages published to `pkgs.k8s.io`

/assign @saschagrunert
cc @kubernetes/release-engineering

[cpanato]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, xmudrii

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

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• cmd/krel/OWNERS [cpanato,xmudrii]

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

[pacoxu]

/cc @kubernetes/kubeadm-maintainers

[k8s-ci-robot]

@pacoxu: GitHub didn't allow me to request PR reviews from the following users: kubernetes/kubeadm-maintainers.

Note that only kubernetes members and repo collaborators can review this PR, and authors cannot review their own PRs.

Details

In response to this:

/cc @kubernetes/kubeadm-maintainers

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[jorhett]

This is half of the fix, the package places the defaults file in the RedHat location:

$ dpkg -L kubelet |grep /kubelet
/etc/sysconfig/kubelet

So this was halfway fixed, you're referring to an env file that doesn't exist. So the 2nd part of the fix is to adjust the file path in the package.

[xmudrii]

@jorhett This issue should be fixed by #3625