GH-132554: Add stats for GET_ITER (GH-132592)

* Add stats for GET_ITER

* Look for common iterable types, not iterator types

* Add stats for self iter and fix naming in summary

Tools/scripts/summarize_stats.py

@@ -288,7 +288,7 @@ class OpcodeStats:
                 opcode = "SUPER"
             elif opcode.endswith("ATTR"):
                 opcode = "ATTR"
-            elif opcode in ("FOR_ITER", "SEND"):
+            elif opcode in ("FOR_ITER", "GET_ITER", "SEND"):
                 opcode = "ITER"
             elif opcode.endswith("SUBSCR"):
                 opcode = "SUBSCR"