Fix missing header `<algorithm>` in tensor_ptr.h (#6778)

This commit import header <algorithm> explictly in extension/tensor/tensor_ptr.h,
which uses `std::transfrom` defined in the header.

Some recent compilers emits error (I checked gcc 14.1.0 / clang 18.1.6):
```
.../executorch/extension/tensor/tensor_ptr.h:114:12: error: no member named
'transform' in namespace 'std'
```