Add strip assertions flag

Part 1 (this pr): add `iree-opt-strip-assertions` to CI.

Part 2: remove flag usage and make this default.

Issue: iree-org#1900

Signed-off-by: Ian Wood <ianwood2024@u.northwestern.edu>

.github/workflows/pkgci_regression_test.yml

@@ -221,7 +221,7 @@ jobs:
             --goldentime-rocm-clip-ms 18.5 \
             --goldentime-rocm-vae-ms 337.0 \
             --goldendispatch-rocm-unet 1531 \
-            --goldendispatch-rocm-clip 1141 \
+            --goldendispatch-rocm-clip 1139 \
             --goldendispatch-rocm-vae 246 \
             --goldensize-rocm-unet-bytes 2280000  \
             --goldensize-rocm-clip-bytes 860000 \
@@ -242,7 +242,7 @@ jobs:
             --goldentime-rocm-clip-ms 15.5 \
             --goldentime-rocm-vae-ms 80.0 \
             --goldendispatch-rocm-unet 1531 \
-            --goldendispatch-rocm-clip 1141 \
+            --goldendispatch-rocm-clip 1139 \
             --goldendispatch-rocm-vae 246 \
             --goldensize-rocm-unet-bytes 2270000 \
             --goldensize-rocm-clip-bytes 860000  \

experimental/benchmarks/sdxl/benchmark_sdxl_rocm.py

@@ -56,6 +56,7 @@ def run_sdxl_rocm_benchmark(rocm_chip):
         f"{benchmark_dir}/sdxl_pipeline_bench_f16.mlir",
         "--iree-hal-target-backends=rocm",
         f"--iree-hip-target={rocm_chip}",
+        "--iree-opt-strip-assertions=true",
         "--iree-global-opt-propagate-transposes=true",
         "--iree-codegen-llvmgpu-use-vector-distribution",
         "--iree-codegen-gpu-native-math-precision=true",