Bump pinned IREE version to 20241206. (#778)

Note that the mobilenet program being tested was miscompiling and
producing different output compared to onnxruntime prior to
iree-org/iree@d48071d.

.github/workflows/ci_linux_x64_asan-libshortfin.yml

@@ -104,7 +104,7 @@ jobs:
       uses: actions/cache/restore@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
       with:
         path: ${{ env.PYENV_ROOT }}
-        key: ${{ runner.os }}-python-deps-${{ hashFiles('shortfin/requirements-tests.txt') }}-v${{ env.CACHE_DEPS_VER }}
+        key: ${{ runner.os }}-python-deps-${{ hashFiles('shortfin/requirements-tests.txt', 'requirements-iree-pinned.txt') }}-v${{ env.CACHE_DEPS_VER }}
 
     - name: Restore Python ASan cache
       id: cache-python-asan
@@ -152,4 +152,4 @@ jobs:
       working-directory: ${{ env.LIBSHORTFIN_DIR }}
       run: |
         eval "$(pyenv init -)"
-        pytest -s
+        pytest -s --durations=10 --timeout=30

requirements-iree-pinned.txt

@@ -3,8 +3,8 @@
 # Keep these versions synced with SHORTFIN_IREE_GIT_TAG in shortfin/CMakeLists.txt
 --pre
 --find-links https://iree.dev/pip-release-links.html
-iree-base-compiler==3.1.0rc20241204
-iree-base-runtime==3.1.0rc20241204
+iree-base-compiler==3.1.0rc20241206
+iree-base-runtime==3.1.0rc20241206
 
 # TODO(#760): include iree-turbine in this requirements file too?
-# iree-turbine==3.1.0rc20241205
+# iree-turbine==3.1.0rc20241206

shortfin/tests/invocation/mobilenet_program_test.py

@@ -74,7 +74,10 @@ async def assert_mobilenet_ref_output(device, device_output):
     absmean = functools.reduce(
         lambda x, y: x + abs(y) / len(flat_output), flat_output, 0.0
     )
-    assert absmean == pytest.approx(5.01964943873882)
+    # Note: this value was just copied from a sample run of the test.
+    # Comparison against a reference backend for this model is tested upstream
+    # in https://github.com/iree-org/iree-test-suites/tree/main/onnx_models.
+    assert absmean == pytest.approx(0.81196929)
 
 
 # Tests that a single invocation on a single fiber works.