feat: Update apiVersion argoproj.io/v1alpha1 to v1beta1 for ArgoCD in docs and tests

[olivergondza]

What type of PR is this?

/kind chore

What does this PR do / why we need it:

The examples in the docs are outdated

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

Which issue(s) this PR fixes:

None

How to test changes / Special notes to the reviewer:

[jgwest]

For the kuttl tests, IMHO we can leave them as is and remove those changes from this PR. Why?

• The kuttl tests will likely be entirely removed shortly, anyways.
• The kuttl tests are no longer run as part of PRs, so this PR may unintentionally break them and we would not know. (Unless, for example, you have personally run those kuttl tests yourself from your own machine)

[olivergondza]

For the kuttl tests, IMHO we can leave them as is and remove those changes from this PR. Why?

• The kuttl tests will likely be entirely removed shortly, anyways.
• The kuttl tests are no longer run as part of PRs, so this PR may unintentionally break them and we would not know. (Unless, for example, you have personally run those kuttl tests yourself from your own machine)

Yeah, makes sense since we want to throw them away. For my complete kuttl ignorance, it will that be all the references in tests/ of just the ones with kuttl CRs? Thanks!