Remove kubevirt/pkg/controller dependency

[xrstf]

Pull Request

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

• Refactoring

By importing kubevirt.io/kubevirt, KubeOVN also has to import and deal with an incredible amount of legacy cruft. Compare to kubevirt.io/api, the Go dependencies of the main kubevirt module are not so very much up-to-date.

KubeOVN only uses a single struct from the kubevirt codebase, and of that struct just very little. I propose that it is cheaper and in the long-term more maintainable to copy-paste the required code into this repository. This gets rid of the heavy dependency and quite a few replace directives. This in turn helps other projects that import KubeOVN into their codebase.

Since both projects are Apache Licensed, I would consider this an okay-ish hack with more upsides than downsides.

[coveralls]

Pull Request Test Coverage Report for Build 12814051495

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 72 (0.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.03%) to 22.302%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controller/controller.go	0	1	0.0%
pkg/controller/kubevirt.go	0	1	0.0%
pkg/informer/kubevirt.go	0	70	0.0%

Totals
Change from base Build 12807092649:	-0.03%
Covered Lines:	10378
Relevant Lines:	46534

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💛 - Coveralls