Missing WW3 restart file in cpld_restart_p8_lnd

[uturuncoglu]

As a part of the PR #2387, new fully coupled RT with land component is created but as a result of the misunderstanding WW3 restart file (ufs.cpld.ww3.r.2021-03-23-21600.nc) is removed from the test. This needs to be added back.

[gspetro-NOAA]

@uturuncoglu Are you planning to add this file in with an upcoming PR? Or is this something you'd like us to do?

[uturuncoglu]

@gspetro-NOAA Unfortunately, There won't be any additional PR related with land component in my end since the project is ended and we are preparing final JTTI report. I think, this minor change can be added to any other PR.