Divide iree_utils and do module imports on function calls.

.github/workflows/python-format.yml

@@ -0,0 +1,15 @@
+name: black-formatter
+on: [pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.10.5
+      - name: Install Black
+        run: pip install black
+      - name: Run formatter check on the entire project.
+        run: black --line-length 80 --check .