Test with latest kind k8s versions 1.22-1.26. Remove support for old
disruptionbudget and ingress APIs (pre 1.22).
Pin all actions to SHAs, and use the common jira sync.
Update the default Vault version to v1.13.1.
Update chart-verifier used in tests to 1.10.1, also add an openshift
name annotation to Chart.yaml (one of the required checks).
* remove 1.16 from the versions tested in .github/workflows/acceptance.yaml as kind no longer supports creating a k8s 1.16 cluster
* update vault-helm's minimum support k8s version to 1.20 in README and Chart.yaml
* refactor server-ingress's templating and unit tests applied to k8s versions < 1.20
