[Bug fortran/88960] [F18] ISO_FORTRAN_ENV: add INITIAL_TEAM, PARENT_TEAM, and CURRENT_TEAM

[weeks at iastate dot edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88960

--- Comment #1 from Nathan Weeks <weeks at iastate dot edu> ---
Note that GET_TEAM() itself is currently broken in gfortran (pr88154).