integration_2022_wk18

See merge request oai/openairinterface5g!1545

Merged MRs:
- MR !1484 NR 20 MHz with LTE raster on AW2S Jaguar
- MR !1499 Handle RRC processing time at gNB
- MR !1511 NR UE memory leak fixes
- MR !1523 Avoid gNB to exit when UE release or becomes out of coverage
- MR !1533 Code and CI fixes
- MR !1536 feat(ci): add script to properly flatten the target images
- MR !1537 Fix for OAI UE AUTH_REQ processing additional check for RAND value
- MR !1543 x2 nsa bug at socket establishment

Avoid usage of preferred_dl_tda and preferred_ul_tda before their computation and improve code readability

Update documentation to be able to run OAI gNB with OAI UE and COTS UE with the same configuration file

Instead of NULL RAND value check, added the flag to indicate if the
AUTH process started. The flag is used manage the timer handling
for authentication process when stored RAND values is same as received
RAND value in AUTH_REQ.

There is still a leak that needs to be fixed in rrc_UE.c
Should properly free NR_BCCH_BCH_Message_t *bcch_message after asn decoder using ASN_STRUCT_FREE()

When using phy-test mode, the RNTI for PDCP/RLC initialization would be
0, incorrectly initializing these layers, fixed in this commit.

Additionally, in this commit, we only trigger the initialization in
cases where the UE context is initialized (before, the RNTI might be 0
in other cases as well).