Merge remote-tracking branch 'origin/config_sa_mode' into integration_2024_w45 (!3024)

Set SA mode as default

- Set standalone (SA) mode as the default.
- Adjust commands in Docker Compose files by removing --sa flags and
  adding --nsa flags where applicable.
- Add a function to verify that only one mode is being used at a time.
- Update all relevant documentation.

common/utils/telnetsrv/telnetsrv_rrc.c

@@ -49,7 +49,7 @@
  * ./build_oai --build-lib telnetsrv
  * 
  * Loading the module:
- * sudo ./nr-softmodem --sa -E --rfsim --log_config.global_log_options level,nocolor,time -O ~/gnb.sa.band78.106prb.rfsim.conf --telnetsrv --telnetsrv.shrmod rrc
+ * sudo ./nr-softmodem -E --rfsim --log_config.global_log_options level,nocolor,time -O ~/gnb.sa.band78.106prb.rfsim.conf --telnetsrv --telnetsrv.shrmod rrc
 */
 
 static int get_single_ue_id(void)