another day, another mypy update becomes stricter about typing

Move GlobalState to a runtime T.NamedTuple, use it for constructing the
tuple we are passing around rather than expecting mypy to detect that
the one we already have matches.

run_project_tests.py

@@ -1185,7 +1185,7 @@ def _run_tests(all_tests: T.List[T.Tuple[str, T.List[TestDef], bool]],
     print(f'\nRunning tests with {num_workers} workers')
 
     # Pack the global state
-    state = (compile_commands, clean_commands, test_commands, install_commands, uninstall_commands, backend, backend_flags, host_c_compiler)
+    state = GlobalState(compile_commands, clean_commands, test_commands, install_commands, uninstall_commands, backend, backend_flags, host_c_compiler)
     executor = ProcessPoolExecutor(max_workers=num_workers)
 
     futures: T.List[RunFutureUnion] = []