fix: drop long seq even if not sample packing #2211
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Description
empti
reported in discord https://discord.com/channels/1104757954588196865/1111279858136383509/1320021873878372436 that sequences are truncated not dropped if sample_packing is off. This PR tries to fix that. RL path seems fine, only SFT is missing.[ ] Check for pretraining case
[ ] Check handling for if
skip_prepare: True
Motivation and Context
How has this been tested?
Untested!
Screenshots (if appropriate)
Types of changes
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