chore(ci): Split tox install from test

Author: effigies

.github/workflows/build-test-deploy.yml

@@ -87,8 +87,11 @@ jobs:
           uv tool install --with=tox-uv --with=tox-gh-actions tox
       - name: Show tox config
         run: tox c
-      - name: Run tox
-        run: tox -v --exit-and-dump-after 1200
+      - name: Setup test suite
+        run: tox run -vv --notest
+      - name: Run test suite
+        id: pre
+        run: tox -v --skip-pkg-install --exit-and-dump-after 1200
       - uses: codecov/codecov-action@v5
         if: ${{ always() }}
         with: