Added 3 way F1 handover test with data exchange in the F1 pipeline.
The major change is that the UE is acting as a server in the handover
scenarion, so it needs to comply with the changes in !3280.

 - Shutdown DL/UL actors
 - Join the main/stat UE threads

FeedbackDisabled is sent in RRCSetup, the UE doesn't have it during MSG4 reception, it can't be used

the standard in 213 8.4 says: "In response to the PDSCH reception with the UE contention resolution identity, the UE transmits HARQ-ACK information in a PUCCH."

Integration: `2025.w09`

See merge request !3284

* !3088 Support for long PRACH formats
* !3266 Add optional UTC time stamp to the logging module
* !3280 Changes required for UE to work as a rfsim server with channel modelling
* !3279 Fix UL-MCS when UL inactivity and no data
* !3283 Limit amp_dmrs to 16 bit signed max