[WIP] ✨ Add OCI source for provider ConfigMap preparation

[Danil-Grigorev]

What this PR does / why we need it:

Allow to specify OCI artifact source for pulling the provider manifests. Similar to URL, the content is stored in a ConfigMap, which is used as a source of truth for the provider state.

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]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from danil-grigorev. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[netlify]

✅ Deploy Preview for kubernetes-sigs-cluster-api-operator ready!

Name	Link
🔨 Latest commit	c9ce229
🔍 Latest deploy log	https://app.netlify.com/sites/kubernetes-sigs-cluster-api-operator/deploys/678698f66ea3850008bdb599
😎 Deploy Preview	https://deploy-preview-683--kubernetes-sigs-cluster-api-operator.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[k8s-ci-robot]

@Danil-Grigorev: 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-verify-main	c9ce229	link	true	/test pull-cluster-api-operator-verify-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.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.