Fixed errors in FixRxKokkos kokkos neighbor lists initialization and usage and calls to computeLocalTemperature.

• Created request for kokkos neighbor list for fix and switched to that neighbor list datatype in computeLocalTemperature.
• Reconfigured pre_force and setup_pre_force to call a common solve_reactions() method to avoid duplicate code.

TODO:

• Clean-up
• Provide per-problem scratch data within kokkos framework (instead of C++ new/delete data).