feat: update apiVersion for `PodDisruptionBudget` and `HorizontalPodAutoscaler`

[karakanb]

What issues does your PR fix?

• fixes #679

What does your PR do?

This PR updates the default apiVersions we use for the PodDisruptionBudget and HorizontalPodAutoscaler resources to ensure support of Kubernetes 1.25+, and introduces values for users to set the older ones, if needed.

Adds the following values for PodDisruptionBudget:

• flower.podDisruptionBudget.apiVersion (default: policy/v1)
• pgbouncer.podDisruptionBudget.apiVersion (default: policy/v1)
• scheduler.podDisruptionBudget.apiVersion (default: policy/v1)
• triggerer.podDisruptionBudget.apiVersion (default: policy/v1)
• web.podDisruptionBudget.apiVersion (default: policy/v1)
• workers.podDisruptionBudget.apiVersion (default: policy/v1)

Adds the following values for HorizontalPodAutoscaler:

• workers.autoscaling.apiVersion (default: autoscaling/v2)

Checklist

For all Pull Requests

• [x] Commits are signed off
• [x] Commits have semantic messages
• [x] Documentation updated
• [ ] Passes ct linting

For releasing ONLY

• [x] Chart.yaml version bumped
• [x] CHANGELOG.md updated

[karakanb]

@thesuperzapper I have done the changes you have asked for, hope it's good to go now. 🤞

[hakuno]

+1 Any news?

[inventionlabsSydney]

Hey guys,

Any news on this? PodDisruptionBudget has been in known deprecation since 1.21. This is now blocking many peoples cluster upgrades.

@thesuperzapper is there anything we as the community can do to move this along faster?