add support for podDisruptionBudgets maxUnavailable

[jdcmarques]

Fixes #1658

Proposed Changes

• Allow for PodDisruptionBudget overrides to work with maxUnavailable as well

Release Note

Allow to use maxUnavailable on created PodDisruptionBudgets

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: jdcmarques / name: José Marques (1dc56cff6db79f5604b4147fb8e8e0318164c6cc, 2b23ae15bb3ff8adb858727779b38bc865188f54)

[knative-prow[bot]]

Welcome @jdcmarques! It looks like this is your first PR to knative/operator 🎉

[knative-prow[bot]]

Hi @jdcmarques. Thanks for your PR.

I'm waiting for a knative member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.21%. Comparing base (f32bc7c) to head (1dc56cf). Report is 5 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1764 +/- ## ========================================== + Coverage 63.54% 66.21% +2.67% ========================================== Files 53 53 Lines 2584 2081 -503 ========================================== - Hits 1642 1378 -264 + Misses 827 588 -239 Partials 115 115 ```

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[houshengbo]

/ok-to-test

[houshengbo]

/lgtm

[knative-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: houshengbo, jdcmarques

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