Update to 20240702 drop from Brevitas.

The primary change is to store the quant params with zero points as int8. This has to be coordinated with a sharktank update.

unet/int8/params.safetensors

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:1047f8e694b0ce7d2fb0754b519b1d3aa7c316bfe74900474f69a261d0077fc7
+oid sha256:ce8cd16604aaace6c44c3d4294f1c2c118a408882df0eacbf231d290085fbf91
 size 5136204272

unet/int8/quant_params.json

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:fbc5f010261abb44cf5c149fc1471cb6cfc272d4c5e94cfdbfd80c9f9d52eb39
-size 85103981
+oid sha256:9d18e5a186267b96c4dbeae85db1547fafcac5eaaad3a35f7daadb309fa5e30c
+size 86815606