feat: Added new policy to PodDisruptionBudget

[peterabarr]

Is this a bug fix or adding new feature?

New feature

What is this PR about? / Why do we need it?

I opened an issue #2146 asking for support for the new unhealthyPodEvictionPolicy for the PDB in the chart.

What testing is done? I generated a helm template file locally and tried to set unhealthyPodEvictionPolicy in the chart values to AlwaysAllow with a successful output.

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[k8s-ci-robot]

Hi @peterabarr. Thanks for your PR.

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[AndrewSirenko]

/ok-to-test

Thanks for the contribution, we'll review it once it is undrafted (marked ready for review)!

I'm pre-emptively marking it ok-to-test so you get CI feedback.

[AndrewSirenko]

/retest

Looks like an unrelated flake

[peterabarr]

@AndrewSirenko Hey thanks I've just done a local test myself and posted it inside the PR as well as taking it out of draft now!

[github-actions[bot]]

Code Coverage Diff

This PR does not change the code coverage

[AndrewSirenko]

/lgtm

Works with the following:

helm upgrade \
  --install aws-ebs-csi-driver \
  --namespace kube-system \
  $HOME/workplace/aws-ebs-csi-driver/charts/aws-ebs-csi-driver \
  --values "..." \
  --set controller.podDisruptionBudget.unhealthyPodEvictionPolicy=AlwaysAllow

spec:                                                                                                                              │
│   maxUnavailable: 1                                                                                                                │
│   selector:                                                                                                                        │
│     matchLabels:                                                                                                                   │
│       app: ebs-csi-controller                                                                                                      │
│       app.kubernetes.io/instance: aws-ebs-csi-driver                                                                               │
│       app.kubernetes.io/name: aws-ebs-csi-driver                                                                                   │
│   unhealthyPodEvictionPolicy: AlwaysAllow

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ConnorJC3

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