[Generate] Greedy Search, fix output scores from logits to scores

[patrickvonplaten]

What does this PR do?

🚨🚨 This PR can lead to silently changing values for users of greedy_search and output_scores=True. Please read the issue below 🚨 🚨

Fixes #17424

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[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[sgugger]

Good for me, so that the output is consistently scores.

[patil-suraj]

LGTM!

🚨🚨 This PR can lead to silently changing values for users of greedy_search and output_scores=True. Please read the issue below 🚨 🚨

went through the issue, and it's fine for me since this will actually return the correct scores.

[xkianteb]

@patil-suraj Will there be any support for raw logits instead logits that are processed? (see #17521 )