feat: Get the GVK of the supported NodeClasses as part of the CloudProvider interface

[engedaam]

Fixes #N/A

Description

• For Karpenter to be able to query the APIServer for NodeClass, we will need to know the Kind, Version and Group of the nodeclass supported by the cloudprovider.
• Adding GetSupportedNodeClasses to get all the NodeClasses used by a cloudprovider

How was this change tested?

• N/A

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[njtran]

/lgtm
/approve

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[coveralls]

Pull Request Test Coverage Report for Build 8483611623

Details

• 7 of 13 (53.85%) changed or added relevant lines in 2 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.05%) to 78.882%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kwok/cloudprovider/cloudprovider.go	0	3	0.0%
pkg/cloudprovider/fake/cloudprovider.go	7	10	70.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/node/termination/terminator/eviction.go	2	88.89%

Totals
Change from base Build 8456314668:	-0.05%
Covered Lines:	8266
Relevant Lines:	10479

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💛 - Coveralls