💾 trunk/9973ec93082df39bffc41a1d0e26d368e4defef0: [Operators] Implement nb_power / nb_inplace_power in Dynamo (#186296)

Wires operator.pow and operator.ipow through ternary_op /
ternary_iop in BuiltinVariable, removing them from the old
_handle_op_in_graph table. Adds nb_power_impl (with reverse)
and nb_inplace_power_impl to VariableTracker, ConstantVariable,
TensorVariable, SymNodeVariable, and UserDefinedObjectVariable.
Power is ternary, so the modulus-position...