Fix gpus not being considered when counting allocatables

[ElijahQuinones]

Is this a bug fix or adding new feature? bug fix to address part of gh #2105 gpus not being considered when counting allocatables.

What is this PR about? / Why do we need it? We need this PR in order to fix the above referenced bug

What testing is done? Compared manually to list of gpu instances and created unit tests for instances mentioned in ticket and for a gpu instance with 4 gpus.

[k8s-ci-robot]

Hi @ElijahQuinones. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[torredil]

/ok-to-test

[rdpsin]

Should we do some manual testing by setting up a cluster with GPU instances?

[ElijahQuinones]

Should we do some manual testing by setting up a cluster with GPU instances?

I have manually tested the limit outside of Kubernettes entirely by just spinning up a g4ad.xlarge instance and manually attaching ebs volumes until I hit the limit where all volumes afterwards are stuck in the attaching state this test concluded that 24 volumes could be attached to the g4ad.xlarge which complies with what the documentation provides.

starts at 28 -1 eni -1 root volume -1 gpu -1 instance store we also end up with 24

Additionally the unit tests for a g4ad.xlarge return the expected value of 24 slots.

however if we feel it would cover more bases I can run the test with a g4ad.xlarge cluster just to make sure there is no gotchas.

[github-actions[bot]]

Code Coverage Diff

File	Old Coverage	New Coverage	Delta
github.com/kubernetes-sigs/aws-ebs-csi-driver/pkg/cloud/volume_limits.go	30.2%	27.1%	-3.1

[AndrewSirenko]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AndrewSirenko

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubernetes-sigs/aws-ebs-csi-driver/blob/master/OWNERS)~~ [AndrewSirenko] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[ConnorJC3]

/label tide/merge-method-squash