Upgrade usage of Istio API types to newest version

Description Istio recently released a v1 version for most of the API types they provide. As so, we should update to this latest version.

Reasons Introduction of v1 API version for Istio types.

DoD:

[ ] Provide unit and integration tests.
[ ] Provide documentation.
[ ] Verify if the solution works for both open-source Kyma and SAP BTP, Kyma runtime.
[ ] If you changed the resource limits, explain why it was needed.
[ ] Verify that your contributions don't decrease code coverage. If they do, explain why this is the case.
[ ] Add release notes.

Attachments

kyma-project / api-gateway