Integration: `2025.w22`

• !3415 (merged) several fixes and cleanup for nrLDPC_coding_t2
• !3448 (merged) T: macpdu2wireshark: dump to file instead of sending UDP packets
• !3449 (merged) bugfix: pass correct buffer
• !3453 (merged) CI: revert modification of SSB per RACH occasion in SC-FDMA test
• !3440 (merged) Update NAS documentation
• !3451 (merged) fix the number of preambles per SSB at UE in case PRACH is configured with groupB
• !3441 (merged) Replace hashtable with epoll_event_t in rfsimulator
• !3277 (merged) Add CI test to force RRC IDLE and new connection setup with 5G-S-TMSI
• !3454 (merged) Keep old MAC stats after re-establishment
• !3450 (merged) Make number of UL/DL actors in NR UE fully configurable
• !3458 (merged) (doc): update README with build icons for dedicated arch and os