28.541 rel18 cr0921 update nrm enhancements for nwdaf function
CR number: 0921
Description: In SA#98e, the CR#7901 (S5-226650) for TS 28.541(V18.1.2) was agreed. But in TS 28.541(V18.2.0), some changes related to the NwdafInfo in clause G.4.3 are missing. The CR0921 is to add missing changes related to the NwdafInfo in clause G.4.3, according to CR#7901 (S5-226650).