integration_2022_wk08_b

See merge request oai/openairinterface5g!1469

Properly sending DL ACK/nACKs

See merge request aburger/openairinterface5g!113

This commit include dynamically setting the slots_per_frame
value based on configuration. It also includes some comments.
Lastly, simplified bug fix in MAC layer related to sched_frame
calculation.

Using message_id to identify channel info.

See merge request aburger/openairinterface5g!114

In F1, the time until the serving cell config comes from CU can be
longer than when we want to schedule a particular UE. Then, if we don't
configure the default number of HARQ processes, we can have a segfault.

In this commit, we initially configure 8 HARQ processes. When we get the
right number from RRC, we reconfigure.

The TX correlation calculation incremented the pointer over the outer
TX antenna inside the inner TX antenna loop.  Incrementing the pointer
in the outer loop instead prevents overflowing.

Integration 2022 wk08

See merge request oai/openairinterface5g!1459

As of this commit, the CI would take too much time to process dl_sim.
This commit activate optimizations to be within the CI time limits.

These include:
- Simplifying VNF code.
- Adding comments to several areas of the code.
- Using free_and_zero macros
- Fixing spelling errors