add aot op checks for new hifi ops, add pow_Tensor_Scalar test in HiFi

Summary:
have to rename `xa_nnlib_plusInff` as `xa_nnlib_plusInff_local` because the name duplicates with that of xa_nnlib/algo/ndsp/hifi4/src/inff_tbl.c. Dont want to change compiler flag for this and see no easy solution than refacto the who inff_tbl header in, so hacked with this solution.

Will add other new ops from D68471314 in following diffs

Differential Revision: D69015730

Author: zonglinpeng

backends/cadence/hifi/operators/op_clamp.cpp

@@ -48,7 +48,7 @@ namespace impl {
 namespace HiFi {
 namespace native {
 
-Tensor& clamp_tensor_out(
+Tensor& clamp_Tensor_out(
     RuntimeContext& ctx,
     const Tensor& in,
     const executorch::aten::optional<Tensor>& min_opt,