fix the race condition in UE where PUSCH could not be sent when UE sends PUCCH and PUSCH at the same slot.

Update nfapi/open-nFAPI/nfapi/public_inc/fapi_nr_ue_interface.h, openair1/SCHED_NR_UE/fapi_nr_ue_l1.c, nfapi/oai_integration/nfapi_pnf.h, nfapi/oai_integration/nfapi_pnf.c files

UE Configuration after SIB1 ok, RAR configuraiton/reception ok, Msg3 transmission / reception ok, CU fails when needing to at SRB1

- new data structure RAR_grant_t to handle RAR grant
- new common ul scheduler function
- new common ul pdu configuration function handling ul grants
- new function to fill ul_config_request
- moved pdu configuration code from process dci function
- merged procedures for Msg3 and PUSCH together in nr_ue_scheduler
- the same functions are now handling both PUSCH and Msg3
- relying on ul_config (no more RA Msg3 frame and slot storage)
- done some cleanup and logging in the process

- removed irrelevant prach_config_enabled parameter
- cleanup of commented out code
- minor fixes
- enhancement of logging