add cloud-nuke process

[theautoroboto]

This adds a new cloud-nuke process.

Run make install-cloud-nuke to install cloud-nuke locally
Run make cloud-nuke-dry-run to see what will be deleted
This will request you provide additional input of the account number to ensure you nuke the correct account. Everything will be deleted in the specified AWS account. Add exclusions to configs/cloud-nuke.yaml.
Add additional regions to configs/cloud-nuke.yaml or provide them with the nuke call. Example: AWS_REGION=us-west-2 make cloud-nuke

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[typeid]

issue: Here and below, I would not expect this env var to always be set, you could use aws configure get region to get it dynamically for either profiles/env vars.

[typeid]

I feel like we don't need this script, it essentially does the same that should be built into cloud-nuke, as that should already be using the current AWS profile / envs natively?

[typeid]

Suggestion: we can make the install a dependency to running cloud-nuke. It could be as simple as checking if it's not installed, then insteall, otherwise NOOP.

[openshift-merge-robot]

PR needs rebase.

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