v0.29.2: fix deprecation and LoRA bugs 🐞

All commits

• [SD3] Fix mis-matched shape when num_images_per_prompt > 1 using without T5 (text_encoder_3=None) by @Dalanke in #8558
• [LoRA] refactor lora conversion utility. by @sayakpaul in #8295
• [LoRA] fix conversion utility so that lora dora loads correctly by @sayakpaul in #8688
• [Chore] remove deprecation from transformer2d regarding the output class. by @sayakpaul in #8698
• [LoRA] fix vanilla fine-tuned lora loading. by @sayakpaul in #8691
• Release: v0.29.2 by @sayakpaul (direct commit on v0.29.2-patch)