GRPO + vLLM hang fixed on non-NVLink; dataset fingerprinting corrected

What's Changed

• Fix GRPO + vLLM colocate + PEFT hang on non-NVLink hardware by @albertvillanova in https://github.com/huggingface/trl/pull/6139
• Fix dataset fingerprinting in DPO/SFT tokenization by @qgallouedec in https://github.com/huggingface/trl/pull/6206
• Pass GPU device_ids to barrier fix in GRPO + vLLM colocate + PEFT by @albertvillanova in https://github.com/huggingface/trl/pull/6187
• Integrate the new response parsing API by @qgallouedec in https://github.com/huggingface/trl/pull/5791
• Fix add_response_schema tests for the new parse_response prefix requirement by @qgallouedec in https://github.com/huggingface/trl/pull/6236
• Add prompt-learning guard for PEFT with Liger in GRPO by @albertvillanova in https://github.com/huggingface/trl/pull/6186
• Fix activation offload storage dedupe reuse by @winglian in https://github.com/huggingface/trl/pull/6241

Full Changelog: https://github.com/huggingface/trl/compare/v1.7.0...v1.7.1