- adding a new test case
    - the test case simulate a DL radio channel with noise and runs Iperf test with such channel conditions
    - use CustomCommand class to send commands to a Telnet server
    - switched from netcat’s unsupported -N option (OpenBSD) to --send-only (Ncat 7.94) for compatibility with CI

re-sync CI test in F1 RFSIM

- to be used in the future, for CI of RRCReestablishment in RFSIM
- adding four new test cases (040021, 040022, 040023, 040023) to the RFSIM F1 configuration
- the test cases simulate a disruption of the radio channel, verify UE sync loss and resync
  and restore the original channel conditions
- use CustomCommand class to send commands to a Telnet server

temp xml