Revert "Revert " Fp8 block scale quantization for fmha fwd (#3330)" (#3633)" (#3635)

This reverts commit c495edb11c.

Co-authored-by: Illia Silin <98187287+illsilin@users.noreply.github.com>

[ROCm/composable_kernel commit: 67f0b74ec6]

include/ck_tile/core/numeric/math.hpp

@@ -37,6 +37,13 @@ struct scales
         return lhs_ * rhs;
     }
 
+    template <typename OtherScale>
+    CK_TILE_HOST_DEVICE constexpr auto operator*(OtherScale other) const
+    {
+        auto new_scale = lhs_ * other;
+        return scales<std::decay_t<decltype(new_scale)>>(new_scale);
+    }
+
     private:
     Scale lhs_;
 };