[manifest] update mainfest to add hpp file in csrc. (deepspeedai#5522)

Update the mainfest to cover hpp file in csrc.

MANIFEST.in

@@ -3,7 +3,7 @@ include deepspeed/inference/v2/kernels/ragged_ops/libs/*.so
 include deepspeed/inference/v2/kernels/cutlass_ops/libs/*.so
 recursive-include requirements *.txt
 recursive-include deepspeed *.cpp *.h *.cu *.hip *.tr *.cuh *.cc *.json
-recursive-include csrc *.cpp *.h *.cu *.tr *.cuh *.cc
+recursive-include csrc *.cpp *.h *.hpp *.cu *.tr *.cuh *.cc
 recursive-include op_builder *.py
 recursive-include benchmarks *.py
 recursive-include accelerator *.py