[FEA] Extract some utilities function from `join_common_utils.cuh` into `cuco_helpers.cuh`

In `join_common_utils.cuh`, there are several utilities functions that were created to work with cuco hash tables data structure. They are useful not just in join implementation but also somewhere else, like in search implementation. As such, we should extract there functions into a new file named `cuco_helpers.cuh`.