Collect boot logs even when bootstrap fails

[CecileRobertMichon]

What type of PR is this?

What this PR does / why we need it:

1. When the first control plane fails, the result cluster is nil which means we don't collect any logs. This adds an optional attempt to fetch the Cluster using the boostrapClusterProxy so we can proceed and grab logs on that control plane.
2. When a machine fails to bootstrap, and ssh fail, we're not collecting boot logs because the providerID in the Machine spec has not yet been set (eg https://gcsweb.k8s.io/gcs/kubernetes-jenkins/logs/periodic-cluster-api-provider-azure-e2e-full/1394441682971267072/artifacts/clusters/capz-e2e-4t733z/machines/capz-e2e-4t733z-control-plane-wnkbt/). Fix is to use the AzureMachine spec to get the provider ID of the VM.

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 #

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

NONE

[CecileRobertMichon]

This seems to be working, boot logs were collected for the first control plane machine with failed cloud-init --> https://gcsweb.k8s.io/gcs/kubernetes-jenkins/pr-logs/pull/kubernetes-sigs_cluster-api-provider-azure/1383/pull-cluster-api-provider-azure-e2e/1395136518770659328/artifacts/clusters/capz-e2e-gdyh7y/machines/capz-e2e-gdyh7y-control-plane-7kbrd/

Will revert the change to fail cloud init on purpose and remove WIP

[CecileRobertMichon]

/assign @chewong @devigned

[nader-ziada]

/lgtm
/approve

[k8s-ci-robot]

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