Python: add opcodes for safe py-drivers

The following opcodes have been added, see [0] for details:

- LIST_TO_TUPLE: convert a list to a tuple,
  use for constructing lists/tuples in some cases.

- LIST_EXTEND: use for constructing lists with unpacking.

- SET_UPDATE: use for constructing sets with unpacking.

- CONTAINS_OP: check if `a in b` generally useful.

When writing tests these op-codes where needed for basic operations
and can be safely supported.

Add note why dictionary manipulation op-codes have been left out.

Also restrict namsepace access to anything with an underscore prefix
since these may be undocumented.

[0]: https://docs.python.org/3.10/library/dis.html

source/blender/python/intern/bpy_driver.h

@@ -10,6 +10,8 @@
 extern "C" {
 #endif
 
+#include <stdbool.h>
+
 /**
  * For faster execution we keep a special dictionary for py-drivers, with
  * the needed modules and aliases.
@@ -21,6 +23,14 @@ int bpy_pydriver_create_dict(void);
  */
 extern PyObject *bpy_pydriver_Dict;
 
+extern bool BPY_driver_secure_bytecode_test_ex(PyObject *expr_code,
+                                               PyObject *namespace_array[],
+                                               const bool verbose,
+                                               const char *error_prefix);
+extern bool BPY_driver_secure_bytecode_test(PyObject *expr_code,
+                                            PyObject *namespace,
+                                            const bool verbose);
+
 #ifdef __cplusplus
 }
 #endif