🌱 Use apimachinery runtime to register API scheme

[Fedosin]

What this PR does / why we need it:
To remove controller-runtime dependency from our API package, we replace its "scheme" package with apimachinery's runtime.

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

[k8s-ci-robot]

@Fedosin: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-operator-apidiff-main	c5777f4	link	false	/test pull-cluster-api-operator-apidiff-main

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[alexander-demicev]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alexander-demicev

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• OWNERS [alexander-demicev]

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[damdo]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: aeea2e88dadd9e95b12c00340b99ca2d6df41361