🐛 capd: do not reconcile machine if cluster or machine is paused

[sbueringer]

What this PR does / why we need it:
Currently CAPD reconciles machines even when the corresponding cluster is paused. For more details see the linked issue.

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 #4426

The corresponding test capi-e2e.When testing Cluster API working on self-hosted clusters Should pivot the bootstrap cluster to a self-hosted cluster fails pretty regularly: https://testgrid.k8s.io/sig-cluster-lifecycle-cluster-api#capi-e2e-main&width=20
(I would say about 5-15%)

[sbueringer]

/test pull-cluster-api-full-e2e-main

[k8s-ci-robot]

@sbueringer: The specified target(s) for /test were not found.
The following commands are available to trigger jobs:

• /test pull-cluster-api-build-main
• /test pull-cluster-api-make-main
• /test pull-cluster-api-apidiff-main
• /test pull-cluster-api-verify
• /test pull-cluster-api-test-main
• /test pull-cluster-api-e2e-main
• /test pull-cluster-api-e2e-full-main
• /test pull-cluster-api-e2e-workload-upgrade-1-20-latest-main

Use /test all to run the following jobs:

• pull-cluster-api-build-main
• pull-cluster-api-make-main
• pull-cluster-api-apidiff-main
• pull-cluster-api-verify
• pull-cluster-api-test-main
• pull-cluster-api-e2e-main

In response to this:

/test pull-cluster-api-full-e2e-main

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[sbueringer]

/test pull-cluster-api-e2e-full-main

[sbueringer]

/retest

[sbueringer]

/retest

[vincepri]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vincepri

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