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

Creation of function NFAPI_NR_DMRS_TYPE1_linear_interp(), NFAPI_NR_DMRS_TYPE1_average_prb(), NFAPI_NR_DMRS_TYPE2_linear_interp() and NFAPI_NR_DMRS_TYPE2_average_prb()

To use c16maddShift(), c32x16maddShift(), c16multaddVectRealComplex(), and c16x32div() functions in nr_pdsch_channel_estimation()

integration_2023_w08b

See merge request oai/openairinterface5g!1972

!1613 Implementation of NR_RRCReestablishment procedures
!1734 KPI GUI with Qt5 from ESA 5G-GOA project
!1751 Refactor and simplify CI UE Handling
!1948 Remove unmaintained ocp-enb, some clean up in CMakeLists.txt
!1969 support old versions of openssl
!1970 bugfix: increase size of nrb
!1971 multiple pdu sessions regression fix

We can have 273 RBs, so 8 bits to store the number of RBs is not enough.
16 bits ought to be enough for anybody.

Needed for ubuntu 16 and centos 7.