📖 List provider implementations of MachinePools

[mboersma]

What this PR does / why we need it:

Adds a markdown table of known implementors of MachinePool.

This was a task we talked about at the first MP working group meeting. I visited all listed provider repos and grepped for MachinePool. (I hear GCP has an implementation in progress as well.)

Which issue(s) this PR fixes:

Refs #9005

/area documentation
/area machinepool

[mboersma]

/cc @richardcase

[sbueringer]

Thx!
/approve
/hold

Feel free to merge once you have all the reviews you want

[k8s-ci-robot]

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[musaprg]

I'd prefer to use the name listed in the provider list, but no strong preference.

[richardcase]

Looks good, thanks for doing this @mboersma.

It would be good to add CAPG into the list as there is an implementation in progress.

[mboersma]

I updated the providers to match how they're described elsewhere in the docs, noted that OCI supports MPMs, and added a section for the GCP implementation in progress. Thanks everyone for the helpful feedback!

[musaprg]

Thank you! Looks good to me.

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 2fa1200b49f0155bdffb7b15c5db5591f8f9b8a8

[richardcase]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 9ebdd41adf5a94f184f594b4d518bb063160db04

[mboersma]

/hold cancel