This reverts commit 29268d0a.

This reverts commit daf8b950

This reverts commit 96554bef

- removed calls to the TDD UL/DL configuration common in FDD mode
- bugfix in the generation of prach info from index
- initial adaptation of gNB schedulers
- adapted PUCCH ack/nack scheduling by taking into account 6 slots min
  delay in FDD mode (to be integrated with latest development of PUCCH)
- made the use of nr_slots_per_frame more consistent

- Estimates correct MCS using EMA, kept between target thresholds
  dl_bler_target_upper and dl_bler_target_lower (conf options) for 1st
  retx and below dl_rd2_bler_threshold for 2nd retx
- Maximum MCS configurable
- on 3rd retx, reduce MCS by 5

Note: some modifications have been done to the UE too, but for syntactic
reasons. The UE may fail to work, not tested.

For the UE, we have the problem of handling properly SecurityModeCommand.
We don't verify its integrity. This is a bit complicated to handle properly
and may require some API changes in the PDCP layer. So, as of today, the
integrity of this message is not verified.

Also, NSA mode has been touched, but it should not be a problem. But not
tested, so not sure.

setting ulsch inactivity timer from slots to frames and removing it from config files (default 10 frames)

changes for initialBWP size different than Coreset0. Tested with 50 MHz 2x2 configuration, initialBWP with 133 PRBs.