✨ WIP: Initial dedicated hosts implementation

[faermanj]

/kind feature

What this PR does / why we need it:

Let users allocate machines in dedicated hosts.

Special notes for your reviewer:

Dedicated hosts must be pre-allocated.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/dedicated-hosts-overview.html

Checklist:

• squashed commits
• includes documentation
• includes emoji in title
• adds unit tests
• adds or updates e2e tests

Release note:

NONE

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[nrb]

Could use one of the simplest e2e templates for this.

Will also need to have the test create an EC2 instance to use, and then release it. It would need to happen regardless of any test failures; might have to update AWS janitor

[faermanj]

Could use one of the simplest e2e templates for this.

I'll try unmanaged/unmanaged_CAPI_quick_test.go then, and perhaps add a template to the dev guide afterwards

Will also need to have the test create an EC2 instance to use, and then release it. It would need to happen regardless of any test failures; might have to update AWS janitor
No worries, it is a simple allocate/release, I'll check how to add to the janitor

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Adding label do-not-merge/contains-merge-commits because PR contains merge commits, which are not allowed in this repository.
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