Dlejeune/ck tile 2d multiple reductions (#3147)

* WIP

* Add Unit tests for the Multi Reduction Kernel

* clang format

* Rename multiblock to threadwise

* Multiblock WIP

* Fix multi reduce multi block unit tests

* Multi Reduce Tile Engine: WIP

* refactoring + try addressing precision error

* Fix multiops examples

* Cleanup

* Clean up tile engine's reduce op

* Update changelog

* Fix remod/clang

* Fix dates

* Fix documentation & missing file

* Fix comments

* Use the update_tile api in the multi-block kernel

* Unify threadwise/multiblock into a single kernel + default multiblock output to float in tests

* Add TileParitioner

* Cleanup

* Add warning when no data to process, in the example

* Refactoring Reduce kernel Tile Partioner + cleanup

* Move the tile partioner to its own file

* Add missing includes

* Fix copyright header with update_amd_copyright_headers.py

* Fix change of interface in Reduce2dProblem

---------

Co-authored-by: Damien Lejeune <damien.lejeune@amd.com>
Co-authored-by: Adam Osewski <19374865+aosewski@users.noreply.github.com>

[ROCm/composable_kernel commit: 4216d43da8]

include/ck_tile/core/utility/reduce_operator.hpp

@@ -4,6 +4,7 @@
 #pragma once
 
 #include "ck_tile/core/config.hpp"
+#include "ck_tile/core/arch/generic_memory_space_atomic.hpp"
 #include "ck_tile/core/utility/type_traits.hpp"
 
 namespace ck_tile {
@@ -34,6 +35,11 @@ struct Add
 
         return type_convert<T>(y_ + x_);
     }
+
+    CK_TILE_HOST_DEVICE static constexpr auto GetAtomic()
+    {
+        return memory_operation_enum::atomic_add;
+    }
 };
 
 struct SquareAdd