docs: Add section about Machine Location

[evanfreed]

What this PR does / why we need it:

Adds section to docs about machine location.

Kudos to @itspngu -- This reattempts to merge https://github.com/kubernetes-sigs/cluster-api-provider-gcp/pull/455.

I unfortunately couldn't cherry-pick it as the original repo is deleted, but think this information is still highly relevant and important to people who are getting started with CAPG.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Related to #444

Special notes for your reviewer:

TODOs:

• [ ] squashed commits
• [x] includes documentation
• [ ] adds unit tests

Release note:

NONE

Signed-off-by: Evan Freed [email protected]

/kind documentation

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: evanfreed Once this PR has been reviewed and has the lgtm label, please assign neolit123 for approval by writing /assign @neolit123 in a comment. For more information see:The Kubernetes Code Review Process.

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[cpanato]

/ok-to-test /assign @pydctw

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/lifecycle stale

[evanfreed]

/remove-lifecycle stale

[richardcase]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, evanfreed

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