[WIP] Update to Ginkgo v2

[mboersma]

What type of PR is this?:

/kind cleanup

What this PR does / why we need it:

Updates the Ginkgo test framework to v2 in CAPZ e2e tests.

This is mostly for discussion and learning. This change shouldn't merge until CAPI and other dependencies are also using Ginkgo v2, since the indirect import of v1 will conflict. I used an import hack to work around this for now.

CAPZ has been abusing nested container nodes. This is now an error in Ginkgo v2, so we might consider getting out ahead of that by extracting those Context -> By changes into a separate PR.

This is a minimal refactoring, but there are more idiomatic changes such as Spec Labels that we might also consider.

Which issue(s) this PR fixes:

Refs kubernetes-sigs/cluster-api#4897

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

Update to Ginkgo v2

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[mboersma]

/retitle [WIP] Update to Ginkgo v2

[k8s-ci-robot]

@mboersma: 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
pull-cluster-api-provider-azure-ci-entrypoint	1921935	link	true	/test pull-cluster-api-provider-azure-ci-entrypoint

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[CecileRobertMichon]

k/k migrated to v2 so that may be a forcing function kubernetes/kubernetes#109111

[mboersma]

I made a PR to update to Ginkgo v2 in CAPI here: kubernetes-sigs/cluster-api#6906. When that merges in a release, we can revisit and rebase this.

[mboersma]

/close

See #2486. I'll resurrect the other changes here once kubernetes-sigs/cluster-api#6906 has merged.