Test the numba wrapper in test-and-deploy (#7413)

- Resolve comments from #5592:
- Replace a silly indirect import
https://github.com/compiler-explorer/compiler-explorer/pull/5592#discussion_r1962004963
- Run `test_numba_wrapper` in `.github/workflows/test-and-deploy.yml`.
https://github.com/compiler-explorer/compiler-explorer/pull/5592#discussion_r1962004131
- Patch minor errors in `etc/scripts/util/propschecktest.py` and also
test it.

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

@@ -18,13 +18,17 @@ jobs:
           check-latest: true
           cache: npm
       - name: Install prerequisites
-        run: make prereqs
+        run: |
+          make prereqs
+          python3 -m pip install numba
       - name: Run checks
         run: |
           npm run lint-check
           npm run test
           npm run ts-check
           python3 ./etc/scripts/util/propscheck.py
+          python3 ./etc/scripts/util/propschecktest.py
+          python3 ./etc/scripts/test_numba_wrapper.py
       - uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}