gh-81057: Move the Remaining Import State Globals to _PyRuntimeState (gh-99488)

https://github.com/python/cpython/issues/81057

Include/internal/pycore_runtime_init.h

@@ -39,6 +39,16 @@ extern "C" {
         .types = { \
             .next_version_tag = 1, \
         }, \
+        .imports = { \
+            .lock = { \
+                .mutex = NULL, \
+                .thread = PYTHREAD_INVALID_THREAD_ID, \
+                .level = 0, \
+            }, \
+            .find_and_load = { \
+                .header = 1, \
+            }, \
+        }, \
         .global_objects = { \
             .singletons = { \
                 .small_ints = _Py_small_ints_INIT, \