🌱 Enable Webhooks and CertManager for CAPI operator

[wfernandes]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #4131
Ref #3833

/area api
/area operator

[k8s-ci-robot]

@wfernandes: The label(s) area/operator cannot be applied, because the repository doesn't have them

In response to this:

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #4131
Ref #3833

/area api
/area operator

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[wfernandes]

/hold
Putting a hold because ideally, this PR will be merged after #4126

[k8s-ci-robot]

@wfernandes: PR needs rebase.

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[fabriziopandini]

/milestone v0.4.0

[fabriziopandini]

@JoelSpeed @alexander-demichev do we still need this PR?

[alexander-demicev]

I think it can be closed, rebasing it will be harder than opening a new one.

[fabriziopandini]

as per comment above
/close

[k8s-ci-robot]

@fabriziopandini: Closed this PR.

In response to this:

as per comment above
/close

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