Update unet assets for fused qkv quantization.

This is based off of code changes: https://github.com/nod-ai/sharktank/pull/106

unet/int8/export/sdxl_unet_int8_dataset.irpa

@@ -1,3 +1,3 @@
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-oid sha256:a2393e47c74efd5a6466254dd5beb63215636932c1bb639311d57555dc1fcafe
-size 2617393152
+oid sha256:8ce953fbe4a576f7ca31f6816651645d4d36055864273a1d49de3a552b197a42
+size 2616446976

unet/int8/export/sdxl_unet_int8_export.mlir

@@ -1,3 +1,3 @@
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-oid sha256:8c401e05476d4f3c99f9c65d8949ea547526d6a18828fcd0cc1a1f3629cdef6c
-size 7912162
+oid sha256:f9658d9696af26189a8fa769354a94b6c4b98c1ce167436273874db402b44e92
+size 7531047

unet/int8/params.safetensors

@@ -1,3 +1,3 @@
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-oid sha256:ce8cd16604aaace6c44c3d4294f1c2c118a408882df0eacbf231d290085fbf91
-size 5136204272
+oid sha256:56402309091a6180f85ee4c1a454f272030182a8a0d583e92c7945de6dbc6604
+size 5136147144

unet/int8/quant_params.json

@@ -1,3 +1,3 @@
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-oid sha256:9d18e5a186267b96c4dbeae85db1547fafcac5eaaad3a35f7daadb309fa5e30c
-size 86815606
+oid sha256:35a2ad3fff64594a6d512105d61529864e27827035f7bd728f15d1b63cc64eff
+size 80112598