Support for Kubernetes v1.30

[shafeeqes]

How to categorize this PR?

/area open-source usability /kind enhancement /platform openstack /exp intermediate /topology garden seed shoot /merge squash

What this PR does / why we need it: This PR adds support for Kubernetes 1.30 to the extension.

Which issue(s) this PR fixes: Part of https://github.com/gardener/gardener/issues/9508

Special notes for your reviewer:

• I have successfully validated the functionality as follows:
  • [x] Create new clusters with versions < 1.30
  • [x] Create new clusters with version = 1.30
  • [x] Upgrade old clusters from version 1.29 to version 1.30
  • [x] Delete clusters with versions < 1.30
  • [x] Delete clusters with version = 1.30

Release note:

The provider-openstack extension does now support shoot clusters with Kubernetes version 1.30. You should consider the [Kubernetes release notes](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.30.md) before upgrading to 1.30. 

[shafeeqes]

/invite @MartinWeindel @kon-angelo

[gardener-robot]

@kon-angelo You have pull request review open invite, please check