- no need to specify "single-ue" profile when running iperf test for 1 UE only
- default profile "balanced" can be used instead, computes BW for 1 UE correctly

- Remove IperfFromContainer
- Remove unused functions IperfExit and PingExit
- Remove unused function for iperf analysis

- add traffic servers
- add runServer parameter

On Wayland (e.g., Gnome on Ubuntu 22), additional steps might be
necessary to make QtScope run. Describe them in the doc.

Closes: #696

use layer number and not dmrs port number to index pusch channel estimates (plus some code improvement)

use layer number and not dmrs port number to index pdsch channel estimates (plus some code improvement)

38.473 section 8.2.3.1 says that upon F1 Setup Request, UE associated
signalling should be erased. In this commit, we trigger a release of all
UEs that were still connected to a DU when we received the SCTP
shutdown, i.e., when the DU disconnects.

Closes #762

Explanations: see #706. TLDR: the RRC code calls nr_pdcp_remove_ue(), so
we should not call it in the E1 handler if we do not use split mode.

From 3GPP TS 38.321 Section 5.4.3 Multiplexing and assembly, we need to process the highest priority subPDUs first:
- MAC CE for C-RNTI is the one with higher priority

DCI formats 11 and 01 assume the presence of an active BWP, if not present return with an error to prevent segfault

demoting to LOG_D another log that otherwise would be printed too many times at the UE because of periodic calling of to_nrarfcn