[Bugfix] Fix offline whisper+docs

[NickLucche]

Cherry picked vllm-project#13274 to fix whisper for offline use.

[openshift-ci]

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[openshift-ci]

@NickLucche: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/smoke-test	7520d35	link	true	/test smoke-test
ci/prow/rocm-pr-image-mirror	7520d35	link	true	/test rocm-pr-image-mirror
ci/prow/cuda-pr-image-mirror	7520d35	link	true	/test cuda-pr-image-mirror
ci/prow/images	7520d35	link	true	/test images

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