📖 Update InfraMachine contract to include pausing rule

[theobarberbany]

What this PR does / why we need it:
This change updates the infra machine provider contract to account for a new paused condition.

/area documentation

Relates #10130

(The same as #10519 but for InfraMachine.)

[k8s-ci-robot]

Hi @theobarberbany. Thanks for your PR.

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[sbueringer]

Thx!

/ok-to-test
/lgtm
/assign @fabriziopandini

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 1adc27209b104760321f770d686e683c93659a99

[fabriziopandini]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini

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