chore: Enable GCI for golangci-lint

[tenzen-y]

What this PR does / why we need it:
It's challenging to keep maintaining the dependencies group, manually. So, It would be great to add golangci-lint opt-in linter, "GCI".

Which issue(s) this PR fixes (optional, in Fixes #<issue number>, #<issue number>, ... format, will close the issue(s) when PR gets merged):
Fixes #

Checklist:

• Docs included if any changes are user facing

[tenzen-y]

/assign @kubeflow/wg-training-leads @astefanutti

[astefanutti]

LGTM, nice!

[Electronic-Waste]

@tenzen-y Thanks for this! LGTM!

/lgtm

[tenzen-y]

#2460 Again

=================================== FAILURES ===================================
_ TestDatasetIntegration.test_dataset_download[HuggingFace - Public dataset-huggingface-test_case0] _

response = <Response [[40](https://github.com/kubeflow/trainer/actions/runs/13925570979/job/38969057348?pr=2540#step:5:41)3]>, endpoint_name = None

    def hf_raise_for_status(response: Response, endpoint_name: Optional[str] = None) -> None:
        """
        Internal version of `response.raise_for_status()` that will refine a
        potential HTTPError. Raised exception will be an instance of `HfHubHTTPError`.
    
        This helper is meant to be the unique method to raise_for_status when making a call
        to the Hugging Face Hub.

[tenzen-y]

/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: astefanutti, Electronic-Waste, tenzen-y

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