add new ingress policy to dex for apiserver

[ti-afra]

Description

For PR author

• [ ] Tests for change.
• [ ] If changing pkg/apis/, run make gen-files
• [ ] If changing versions, run make gen-versions

For PR reviewers

A note for code reviewers - all pull requests must have the following:

• [ ] Milestone set according to targeted release.
• [ ] Appropriate labels:
  • kind/bug if this is a bugfix.
  • kind/enhancement if this is a a new feature.
  • enterprise if this PR applies to Calico Enterprise only.

[rene-dekker]

/merge-when-ready

[marvin-tigera]

OK, I will merge the pull request when it's ready, leave the commits as is when I merge it, and leave the branch after I've merged it.