REQUEST: New kubernetes-sigs membership for @pmengelbert

### GitHub Username

pmengelbert

### Organization you are requesting membership in

kubernetes-sigs

### Requirements

- [x] I have reviewed the [community membership guidelines](https://git.k8s.io/community/community-membership.md)
- [x] I have [enabled 2FA on my GitHub account](https://github.com/settings/security)
- [x] I have subscribed to the [kubernetes dev e-mail list](https://groups.google.com/a/kubernetes.io/group/dev)
- [x] I am actively contributing to 1 or more Kubernetes subprojects
- [x] I have two sponsors that meet the sponsor requirements listed in the community membership guidelines
- [x] I have spoken to my sponsors ahead of this application, and they have agreed to sponsor my application
- [x] I have verified that my sponsors are from different member companies
- [x] I have verified that my sponsors are a reviewer or an approver in at least one OWNERS file within one of the Kubernetes GitHub organizations (excluding the contributor-playground)
- [x] **SUGGESTED:** Ensure your [affiliation in gitdm](https://github.com/cncf/gitdm?tab=readme-ov-file#addingupdating-affiliation) is up to date (gitdm is used by [devstats](https://k8s.devstats.cncf.io/) to track affiliation)
- [x] **SUGGESTED:** Ensure your [affiliation in openprofile.dev](https://openprofile.dev/edit/profile) is up to date (used by [LFX Insights](https://insights.lfx.dev/) to track affiliation, will replace gitdm in the future)
- [x] **SUGGESTED:** I have taken the [Inclusive Open Source Community Orientation course](https://training.linuxfoundation.org/training/inclusive-open-source-community-orientation-lfc102/)

### Sponsor 1

enj

### Sponsor 2

aramase

### List of contributions to the Kubernetes project

I am maintaining secrets-store-csi-driver and need `kubernetes-sigs` membership in order to run tests on PRs to that repo.

- https://github.com/kubernetes/kubernetes/pull/134870
- https://github.com/kubernetes/kubernetes/pull/137272
- https://github.com/kubernetes/kubernetes/pull/137300
- https://github.com/kubernetes/kubernetes/pull/140113
- https://github.com/kubernetes/enhancements/pull/5479
- https://github.com/kubernetes/enhancements/pull/5896
- https://github.com/kubernetes/enhancements/pull/6156
- https://github.com/kubernetes-sigs/secrets-store-csi-driver/pull/2065

Start with the community membership guidelines linked in the request, then verify the completed checklist, sponsors, and listed Kubernetes contributions. Done means the request has been reviewed and the kubernetes-sigs membership decision is recorded.

Written by the indexing model from the issue text.