Round up sdxl golden dispatch sizes and mi250 times by 10%. (iree-org…

…#17879)

See [this discussion on
Discord](https://discord.com/channels/689900678990135345/689957613152239638/1261059802214305913).

These are change detector tests with _some_ use, but exact checking is
too noisy and is causing significant churn across PRs and postsubmit CI
runs. We could change the test script to allow a certain error range,
but for now just increase the thresholds used in `<=` checks by about
10% (then drop a few digits to 0 so we don't give the appearance of high
precision).

ci-exactly: build_packages,regression_test

.github/workflows/pkgci_regression_test.yml

@@ -307,21 +307,24 @@ jobs:
             --durations=0 \
             --config-files=${SDXL_VAE_CONFIG_FILE_PATH}
 
+      # Note: mi250 benchmark times are more lenient than mi300 (allowing about
+      # 10% deviation from observed averages), since the mi250 runners we use
+      # are more unstable and we care most about peak performance on mi300.
       - name: "Running SDXL rocm pipeline benchmark (mi250)"
         if: contains(matrix.name, 'rocm_mi250_gfx90a')
         run: |
           source ${VENV_DIR}/bin/activate
           pytest SHARK-TestSuite/iree_tests/benchmarks/sdxl/benchmark_sdxl_rocm.py \
-            --goldentime-rocm-e2e-ms 1340.0 \
-            --goldentime-rocm-unet-ms 342.0 \
-            --goldentime-rocm-clip-ms 17.5 \
-            --goldentime-rocm-vae-ms 300.0 \
+            --goldentime-rocm-e2e-ms 1450.0 \
+            --goldentime-rocm-unet-ms 370.0 \
+            --goldentime-rocm-clip-ms 18.5 \
+            --goldentime-rocm-vae-ms 315.0 \
             --goldendispatch-rocm-unet 1714 \
             --goldendispatch-rocm-clip 1569 \
             --goldendispatch-rocm-vae 248 \
-            --goldensize-rocm-unet-bytes 2073609  \
-            --goldensize-rocm-clip-bytes 783848 \
-            --goldensize-rocm-vae-bytes 764909 \
+            --goldensize-rocm-unet-bytes 2280000  \
+            --goldensize-rocm-clip-bytes 860000 \
+            --goldensize-rocm-vae-bytes 840000 \
             --gpu-number 6 \
             --rocm-chip gfx90a \
             --log-cli-level=info \
@@ -341,9 +344,9 @@ jobs:
             --goldendispatch-rocm-unet 1714 \
             --goldendispatch-rocm-clip 1569 \
             --goldendispatch-rocm-vae 248 \
-            --goldensize-rocm-unet-bytes 2065289 \
-            --goldensize-rocm-clip-bytes 783848 \
-            --goldensize-rocm-vae-bytes 765869 \
+            --goldensize-rocm-unet-bytes 2270000 \
+            --goldensize-rocm-clip-bytes 860000  \
+            --goldensize-rocm-vae-bytes 840000 \
             --gpu-number 0 \
             --rocm-chip gfx942 \
             --log-cli-level=info \