feat: Support ClusterV2 as ServerlessCluster

[michaelhtm]

Issue #2492

Description of changes:

• Add ClusterV2 support
• test crud and tags

Extra changes to Cluster resource:

• remove unnecessary fmt.Sprintf
• ensure SetSynced is applied to the resource that is returned (previously was discarded)
• remove commented Tag tests!

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[knottnt]

Changes look good. Could you add a bit more detail to the PR description though? This PR does a bit more than test CRUD e2e.

[knottnt]

@michaelhtm It looks like this PR has some conflicts.

[ack-prow]

@michaelhtm: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
kafka-verify-attribution	dc51a26	link	false	/test kafka-verify-attribution

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[knottnt]

/lgtm

[ack-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: knottnt, michaelhtm

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