limit dl_DataToUL_ACK to the number of slots per frame to avoid the need to resize VRB_map and UL_tti_req_ahead

integration_2022_wk50

See merge request oai/openairinterface5g!1869

!1663 UL-MIMO working with 2 layers
!1705 RNTI to UE ID in PDCP, SDAP, GTPU, ...
!1818 Move /targets/user to /executables
!1835 Improve NR SRS configuration
!1837 Add Configuration File Naming Style Guide
!1852 Get data from SRB 1 when generating Msg4
!1857 Use F1AP to transfer SRB1 messages in monolithic mode
!1858 fix NR_LDPC_NUM_BN_GROUPS_BG2_R15
!1862 Fix for msg3 scheduling
!1814 Initial web server implementation
!1847 Move 5G RFsim tests from RAN-CI-develop to RAN-Container-Parent
timeout for RFsim

This will lead to quicker drop of the UE context in the gNB once it
disconnected from RFsim.