Add back horizontal fusion flag.

Signed-off-by: MaheshRavishankar <[email protected]>

Author: MaheshRavishankar

tests/external/iree-test-suites/torch_models/sdxl/modules/clip_gfx942.json

@@ -5,6 +5,7 @@
         "--iree-hip-target=gfx942",
         "--iree-opt-level=O3",
         "--iree-opt-generalize-matmul=false",
+	"--iree-dispatch-creation-enable-fuse-horizontal-contractions=true",
         "--iree-llvmgpu-enable-prefetch",
         "--iree-execution-model=async-external",
         "--iree-preprocessing-pass-pipeline=builtin.module(iree-preprocessing-transpose-convolution-pipeline,iree-preprocessing-pad-to-intrinsics{pad-target-type=conv})"