Draft: Update NR SA tutorials
Update UHD to v4.6.0.0 and update dependencies as described in the official Ettus website
Remove the OAI UE SIM card section (SIM card configurations is an advanced topic, not appropriate for this tutorial)
Add FR2 SA configuration file and instructions for RFsimulator
Replace oai-spgwu-tiny by the new oai-upf
Change UE IP network address blocks for a 'Private-Use' range. Address block 12.1.0.0/16 is for public use, so we should not use it for the UEs
Edited by Luis Pereira