Add a scale op, related instances and examples (#1242)

* Add a scale op

* Update the element op

* Add instances

* Add an example

* Add a client example

* Add a flag check

* Revert flag check addition

* Fix flag check

* Update d strides in example

* Update d strides in client example

* Apply suggestions from code review

Update copyright header

Co-authored-by: Bartłomiej Kocot <barkocot@amd.com>

* Move the example

* Move the client example

* Update element op

* Update example with the new element op

* Add scalar layout

* Update example

* Update kernel for scalar Ds

* Revert kernel changes

* Update element op

* Update example to use scales' pointers

* Format

* Update instances

* Update client example

* Move element op to unary elements

* Update element op to work with values instead of pointers

* Update instances to take element op as an argument

* Update examples to use random scale values

---------

Co-authored-by: Bartłomiej Kocot <barkocot@amd.com>

[ROCm/composable_kernel commit: cb0645bedc]

include/ck/tensor_operation/gpu/element/unary_element_wise_operation.hpp

@@ -961,6 +961,29 @@ struct Elu
     const float alpha_;
 };
 
+struct ConvScale
+{
+    __host__ __device__ ConvScale(float scale_in  = 1.f,
+                                  float scale_wei = 1.f,
+                                  float scale_out = 1.f)
+        : scale_in_(scale_in), scale_wei_(scale_wei), scale_out_(scale_out)
+    {
+    }
+
+    template <typename E, typename C>
+    __host__ __device__ void operator()(E& e, const C& c) const;
+
+    template <>
+    __host__ __device__ void operator()<f8_t, float>(f8_t& e, const float& c) const
+    {
+        e = type_convert<f8_t>(c * scale_in_ * scale_wei_ * scale_out_);
+    };
+
+    float scale_in_;
+    float scale_wei_;
+    float scale_out_;
+};
+
 // support fastconvert of int8 to fp16
 
 template <typename InputDataType, typename OutputDataType, index_t RegPackNumber>