fix: missing method invocation in kube_config_test.py

[kavishdahekar]

What type of PR is this?

/kind bug

What this PR does / why we need it:

The test_load_kube_config_from_dict_with_temp_file_path test calls _cleanup_temp_files without invoking it _cleanup_temp_files(). This PR fixes that.

Which issue(s) this PR fixes:

Fixes n/a

Special notes for your reviewer:

n/a

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[linux-foundation-easycla]

• ✅login: kavishdahekar / (dac8a5c)

The committers listed above are authorized under a signed CLA.

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[roycaihw]

/assign @yliaog

[yliaog]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kavishdahekar, yliaog

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