✨ Implement diagnostics fields in Providers CRD

[fariaass]

What this PR does / why we need it:
This PR adds the fields DiagnosticsAddress and InsecureDiagnostics to ControllerMetrics struct. It also configures these fields as flags in the deployment.
As of CAPI v1.9, the flag --metrics-bind-addr was removed, so the flag --diagnostics-address must be used in place.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: fariaass / name: Lucas de Farias Teixeira (641c65f)

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[k8s-ci-robot]

Hi @fariaass. Thanks for your PR.

I'm waiting for a kubernetes-sigs 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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