Macvtap deprecation

[AlonaKaplan]

What this PR does / why we need it:
Following the introduction of Kubevirt Network Binding Plugin API [1] and of Macvtap network binding plugin [2], it's now possible to remove Macvtap network binding implementation from Kubevirt core.

The transition will be conducted in two phases across the next two releases:
Phase 1 (v1.2) - Kubevirt will raise a warning when the Macvtap interface is being used - this PR.
Phase 2 (v1.3) - Macvtap interface API will stop being supported by kubevirt (using the API will lead to no-op).

[1] https://kubevirt.io/user-guide/virtual_machines/network_binding_plugins
[2] https://kubevirt.io/user-guide/virtual_machines/net_binding_plugins/macvtap

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 #

Special notes for your reviewer:

Checklist

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• Design: A design document was considered and is present (link) or not required
• PR: The PR description is expressive enough and will help future contributors
• Code: Write code that humans can understand and Keep it simple
• Refactor: You have left the code cleaner than you found it (Boy Scout Rule)
• Upgrade: Impact of this change on upgrade flows was considered and addressed if required
• Testing: New code requires new unit tests. New features and bug fixes require at least on e2e test
• Documentation: A user-guide update was considered and is present (link) or not required. You want a user-guide update if it's a user facing feature / API change.
• Community: Announcement to kubevirt-dev was considered

Release note:

Deprecate macvtap

[kubevirt-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[EdDev]

What about the change in the API: schema.go?

[EdDev]

please keep it.

[AlonaKaplan]

/test pull-kubevirt-build
/test pull-kubevirt-build-arm64
/test pull-kubevirt-generate
/test pull-kubevirt-manifests
/test pull-kubevirt-unit-test
/test pull-kubevirt-e2e-k8s-1.27-sig-network

[AlonaKaplan]

/test pull-kubevirt-build
/test pull-kubevirt-build-arm64
/test pull-kubevirt-generate
/test pull-kubevirt-manifests
/test pull-kubevirt-unit-test
/test pull-kubevirt-e2e-k8s-1.27-sig-network

[EdDev]

Thank you.

We need to reason for this deprecation as we did with the passt binding and suggest the alternative.

Please summarize the reasoning and alternative in the description of this PR.
Also, it makes sense to let the community a chance to feedback on such an action.

[EdDev]

Thanks!

[AlonaKaplan]

/approve

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AlonaKaplan

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[kubevirt-commenter-bot]

/retest-required
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@AlonaKaplan: 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-kubevirt-e2e-k8s-1.28-sig-compute	bdc853b	link	unknown	/test pull-kubevirt-e2e-k8s-1.28-sig-compute

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[kubevirt-commenter-bot]

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