[QA] setup Kubernetes in GH Actions

we need to recreate the same setup we had in drone and run tests in k8s

https://github.com/owncloud/ocis/issues/11019
https://github.com/owncloud/ocis/issues/11658

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The following tests suites when ran in full ci mode and K8s enabled: https://github.com/owncloud/ocis/actions/runs/28002096936 failed. The goal is to make the CI green:

- [x] `API-graphUser`
- [ ] `API-spaces`
- [ ] `API-davOperations`
- [ ] `API-groupAndSearch1`
- [x] `API-search2`
- [ ] `API-settingsAndNotification`
- [ ] `API-sharingNg1`
- [ ] `API-sharingNgShareInvitation`
- [ ] `API-sharingNgLinkShare`
- [ ] `API-antivirus`
- [x] `API-ocm`
- [x] `API-AuthApp`
- [ ] `API-wopi`
- [x] `API Vault`
- [x] `Core-API-hareManagementBasicToShares`
- [x] `Core-API-ShareManagementToShares`
- [x] `Core-API-Sharees`
- [x] `Core-API-SharePublicLink2`
- [x] `Core-API-ShareOperationsToShares1`
- [x] `Core-API-ShareOperationsToShares2`
- [x] `Core-API-SharePublicLink1`
- [x] `Core-API-ShareCreateSpecialToShares1`
- [x] `Core-API-ShareCreateSpecialToShares2`
- [x] `Core-API-ShareUpdateToShares`
- [x] `Core-API-Trashbin`
- [x] `Core-API-TrashbinRestore`
- [x] `Core-API-WebdavEtagPropagation1`
- [x] `Core-API-WebdavEtagPropagation2`
- [x] `Core-API-WebdavDelete`
- [x] `Core-API-WebdavOperations`
- [x] `Core-API-WebdavMove2`
- [x] `Core-API-WebdavProperties`

Start with the linked GitHub Actions run and the two referenced issues, then compare the existing Drone setup with the current Kubernetes-enabled workflow. Re-run the listed API suites in full CI mode and use the unchecked suites as the acceptance criteria; done means the CI run is green.

Written by the indexing model from the issue text.