bpo-32030: Add _PyCoreConfig.argv (#4934)

* Add argc and argv to _PyCoreConfig
* _PyMainInterpreterConfig_Read() now builds its argv from
  _PyCoreConfig.arg
* Move _PyMain.env_warning_options into _Py_CommandLineDetails
* Reorder pymain_free()

Include/pystate.h

@@ -47,10 +47,18 @@ typedef struct {
     wchar_t *home;          /* PYTHONHOME environment variable,
                                see also Py_SetPythonHome(). */
     wchar_t *program_name;  /* Program name, see also Py_GetProgramName() */
+
+    int argc;               /* Number of command line arguments,
+                               -1 means unset */
+    wchar_t **argv;         /* sys.argv, ignored if argc is negative */
 } _PyCoreConfig;
 
 #define _PyCoreConfig_INIT \
-    (_PyCoreConfig){.use_hash_seed = -1, .coerce_c_locale = -1, .utf8_mode = -1}
+    (_PyCoreConfig){ \
+        .use_hash_seed = -1, \
+        .coerce_c_locale = -1, \
+        .utf8_mode = -1, \
+        .argc = -1}
 /* Note: _PyCoreConfig_INIT sets other fields to 0/NULL */
 
 /* Placeholders while working on the new configuration API