Fix DEBUG_GENERATION build (#19383)
### Description
Currently, ORT will fail a build when the flag DEBUG_GENERATION is set
to 1 (used to debug BeamSearch and GreedySearch) in
[console_dumper.h](https://github.com/microsoft/onnxruntime/blob/3b63d85c253c50099c70ba0db6c141b842bc7cda/onnxruntime/contrib_ops/cpu/utils/console_dumper.h#L12)
with the following error:
`onnxruntime/onnxruntime/contrib_ops/cpu/transformers/logits_processor.h:270:15:
error: ‘DumpScores’ was not declared in this scope`
This is because it is defined in `logits_processor.cc`, and a debugging
artifact was passed in an earlier PR where this function is called from
`logits_processor.h` before it is defined
[[link](https://github.com/microsoft/onnxruntime/blob/3a2ab1963a195fe8df59e6220d3f191e5dfe80ee/onnxruntime/contrib_ops/cpu/transformers/logits_processor.h#L270)].
Builds with the flag have been broken since that PR was merged.
This PR moves DumpScores() definition from `logits_processor.cc` to
`logits_processor.h` so that all debug statements can be used correctly
in `logits_processor.cc` and `logits_processor.h` and build succeeds
with this debug flag.
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Co-authored-by: Peter McAughan <petermca@microsoft.com>
