Patch Release 4.51.2

This is another round of bug fixes, but they are a lot more minor and outputs were not really affected!

• Fix Llama4 offset (#37414) by @Cyrilvallez
• Attention Quantization with FBGemm & TP (#37384) by @MekkCyber
• use rms_norm_eps for the L2Norm for Llama4 (#37418) by @danielhanchen
• mark llama4 as not supported with fa2 (#37416) by @winglian