Rename Finetuning Scripts
jenkins jenkins LGTM!
# What does this PR do ?

Rename certain unified SFT/PEFT scripts to remove reference to 'PEFT' in the script name, since it was confusing for people to run SFT with a 'peft' script
Rename `*_peft_tuning*` to `*_finetuning*` to include both SFT and PEFT in naming.
Rename `*_peft_eval*` to `*_generate*` to achieve the above and also make clear that the script is simply used to generate text (run inference), and not calculate any metrics.
Old scripts are kept until the next release, with a deprecation message added.

Also making deprecating messages more prominent, with a banner and a wait timer so the message does not get drowned in other nemo logging messages.

**Collection**: NLP

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