[ot] .github: add Python linter

Signed-off-by: Emmanuel Blot <[email protected]>

.github/workflows/build_test.yaml

@@ -76,10 +76,26 @@ jobs:
           sudo apt-get install -y clang-format-18
       - name: Check out QEMU
         uses: actions/checkout@v4
-      - name: Check execution
+      - name: Check C code format
         run: |
           scripts/opentitan/ot-format.sh --ci -i
 
+  lint-python:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install tools
+        run: |
+          sudo apt-get update &&
+          sudo apt-get install -y python3-pip
+          # ubuntu "latest" is too old to require --break-system-packages ...
+          pip3 install pylint
+      - name: Check out QEMU
+        uses: actions/checkout@v4
+      - name: Lint Python code
+        run: |
+          pylint --rcfile scripts/opentitan/.pylintrc -d 'duplicate-code' -d 'fixme' \
+            scripts/opentitan/*.py python/qemu/jtag/* python/qemu/ot/*
+
   lint-clang:
     runs-on: ubuntu-latest
     needs: build-clang