[PTFM-6066] Removing the list_of_all_routes.txt and associated C++ code

  - Instead of the .txt file for all api routes, we keep the JSON equivalent
    wrapper_table.json
  - The C++ code which previously parsed the .txt to .json, is now deprecated
    (since we directly store the json file)
  - wikiLink field has been added to the wrapper_table.json (it can be either
    "null" (in which case it is ignored), or a string)