- adds function to retrieve the only UE's RNTI
- adds function to trigger reestablishment for the only UE present, or a
  specific via its RNTI
- adds function to verify the reestablishment counters

integration_2023_w10

See merge request oai/openairinterface5g!1989

* !1928 Delay compensation for UL
* !1958 Fix IQ recorder/player for nrUE
* !1979 Cleanup of headers, do not include headers in RAN context, CMakeLists.txt link to header only library 1 of 1 checklist item completed
* !1984 bugfix: set max priority to trx_usrp_write_thread
* !1986 Changed buffer alloc and symb rotaion logs to debug
* !1987 fixing UE DL MIMO reception

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Most targets don't need the symbols from the compiled RRC ASN.1
libraries, but only the headers. In particular when compiling individual
libraries (e.g., for tests), linking the full library makes the RRC
ASN.1 libraries compile and link, when they are not needed (only headers
are needed).

For libraries that can do without these headers, don't link them.

The simulators have been changed: due to linker errors that would arise
otherwise, a lot of functions are defined in them to avoid such errors.
Some functions are also defined in header files; in this commit, we
define most functoins in nr_dummy_functions.c, which is compiled in, not
by including the C file, but by adding it to the target in
CMakeLists.txt

- nr_dlsim+nr_ulsim need NR_IF_Module_init(), so it cannot be in
  nr_dummy_functions, but the others need it
- Link correcr NR_IF_Module_init() into these simulators, and reduce
  overall link list
- Correctly link remaining simulators

integration_2023_w09

See merge request oai/openairinterface5g!1980

!1904 DL channel estimation improvements
!1910 Continuation of reworking BWP structure for UE
!1918 Increasing size of UL MAC buffers for 15kHz SCS
!1973 Fix 2-layers UL channel estimation for pusch_dmrs_type2
!1975 minor typo

# Conflicts:
#	openair1/PHY/NR_UE_ESTIMATION/filt16a_32.c
#	openair1/PHY/NR_UE_ESTIMATION/filt16a_32.h
#	openair1/PHY/TOOLS/tools_defs.h