ci: fix Python lint and npm install in tests workflow

Apply f-string fix from gyp-next#337 to resolve ruff F507 in
simple_copy.py, and add npm@~11.10.0 pre-install step from nodejs#3300
to work around npm/cli#9151.

Author: MarshallOfSound

.github/workflows/tests.yml

@@ -67,7 +67,9 @@ jobs:
       with:
         node-version: 22.x
     - name: Update npm
-      run: npm install npm@latest -g
+      run: |
+        npm install npm@~11.10.0 -g # Workaround for https://github.com/npm/cli/issues/9151
+        npm install npm@latest -g
     - name: Install Dependencies
       run: npm install
     - name: Pack

gyp/pylib/gyp/simple_copy.py

@@ -24,8 +24,8 @@ def deepcopy(x):
         return _deepcopy_dispatch[type(x)](x)
     except KeyError:
         raise Error(
-            "Unsupported type %s for deepcopy. Use copy.deepcopy "
-            + "or expand simple_copy support." % type(x)
+            f"Unsupported type {type(x)} for deepcopy. Use copy.deepcopy "
+            + "or expand simple_copy support."
         )