Fix package versions to avoid compatibility issue

[khansaad]

Currently we're only specifying a fixed version for protobuf package in our requirements file i.e. 4.21.8 . We faced issues while running the grpc service in docker because it took the latest grpcio package which is incompatible with the protobuf version 4.21.8 .

So, to fix these issues permanently we need to fix the versions of all the packages that we're using in the requirements file along with the compatible Python version.