fix nr phy-test mode in ntn
Following SIB19 MR !3019 (merged), the phy-test mode is no longer working In this MR we update the handling NTN-Config from ServingCellConfigCommon to be the same as when NTN-Config is received in SIB19
More details: !3019 (comment 145103)
Edited by Ciprian Badescu