[dynamo] Fix ndarray.__pow__ (pytorch#107746)

As per title. Tests in the next PR

Pull Request resolved: pytorch#107746
Approved by: https://github.com/ezyang
ghstack dependencies: pytorch#107687, pytorch#107688, pytorch#107710, pytorch#107711

Author: lezcano

torch/_numpy/_ndarray.py

@@ -146,7 +146,7 @@ def f(*args, **kwargs):
     "mul": "multiply",
     "truediv": "divide",
     "floordiv": "floor_divide",
-    "pow": "float_power",
+    "pow": "power",
     "mod": "remainder",
     "and": "bitwise_and",
     "or": "bitwise_or",