gh-100239: replace BINARY_SUBSCR & family by BINARY_OP with oparg NB_SUBSCR

Include/cpython/object.h

@@ -255,7 +255,7 @@ struct _specialization_cache {
     // - If getitem is NULL, then getitem_version is meaningless.
     // - If getitem->func_version == getitem_version, then getitem can be called
     //   with two positional arguments and no keyword arguments, and has neither
-    //   *args nor **kwargs (as required by BINARY_SUBSCR_GETITEM):
+    //   *args nor **kwargs (as required by BINARY_OP_SUBSCR_GETITEM):
     PyObject *getitem;
     uint32_t getitem_version;
     PyObject *init;

Include/internal/pycore_magic_number.h

@@ -268,6 +268,7 @@ Known values:
     Python 3.14a4 3613 (Add LOAD_CONST_MORTAL instruction)
     Python 3.14a5 3614 (Add BINARY_OP_EXTEND)
     Python 3.14a5 3615 (CALL_FUNCTION_EX always take a kwargs argument)
+    Python 3.14a5 3616 (Remove BINARY_SUBSCR)
 
     Python 3.15 will start with 3650
 
@@ -280,7 +281,7 @@ PC/launcher.c must also be updated.
 
 */
 
-#define PYC_MAGIC_NUMBER 3615
+#define PYC_MAGIC_NUMBER 3616
 /* This is equivalent to converting PYC_MAGIC_NUMBER to 2 bytes
    (little-endian) and then appending b'\r\n'. */
 #define PYC_MAGIC_NUMBER_TOKEN \