improve the readable of test-unit make target

[Frapschen]

What type of PR is this?
/kind test

What this PR does / why we need it:

After this enhancement, make test-unit will finally print:

...
sigs.k8s.io/gateway-api-inference-extension/pkg/epp/util/testing/wrappers.go:249:                                                               TargetPortNumber                                0.0%
sigs.k8s.io/gateway-api-inference-extension/pkg/epp/util/testing/wrappers.go:254:                                                               ExtensionRef                                    0.0%
sigs.k8s.io/gateway-api-inference-extension/pkg/epp/util/testing/wrappers.go:260:                                                               ObjRef                                          0.0%
sigs.k8s.io/gateway-api-inference-extension/pkg/generator/main.go:35:                                                                           main                                            0.0%
total:                                                                                                                                          (statements)                                    60.4%

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

@Frapschen: The label(s) kind/test cannot be applied, because the repository doesn't have them.

In response to this:

What type of PR is this?
/kind test

What this PR does / why we need it:

After this enhancement, make test-unit will finally print:

...
sigs.k8s.io/gateway-api-inference-extension/pkg/epp/util/testing/wrappers.go:249:                                                               TargetPortNumber                                0.0%
sigs.k8s.io/gateway-api-inference-extension/pkg/epp/util/testing/wrappers.go:254:                                                               ExtensionRef                                    0.0%
sigs.k8s.io/gateway-api-inference-extension/pkg/epp/util/testing/wrappers.go:260:                                                               ObjRef                                          0.0%
sigs.k8s.io/gateway-api-inference-extension/pkg/generator/main.go:35:                                                                           main                                            0.0%
total:                                                                                                                                          (statements)                                    60.4%

Does this PR introduce a user-facing change?:

NONE

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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• OWNERS

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[k8s-ci-robot]

Hi @Frapschen. 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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.

[nirrozenbaum]

/ok-to-test