NG_NAS_TypeDefs.ttcn: Use specific type instead of 'record of'

titan 11.0.0 fails during compilation with:

NG_NAS_Common.ttcn:405.21-55: error: Type mismatch: a value of type `@NG_NAS_TypeDefs.XtdRejectedS_NSSAI_List' was expected instead of `@NG_NAS_TypeDefs.PartialXtdRejectedNSSAIType0.rejectS_NSSAI'
NG_NAS_Templates.ttcn:2212.22-32: error: Type mismatch: a value or template of type `@NG_NAS_TypeDefs.QoS_Flow.parameterList' was expected instead of `@NAS_CommonTypeDefs.QoSParametersList
NG_NAS_Templates.ttcn:2364.24-34: error: Type mismatch: a value or template of type `@NG_NAS_TypeDefs.QoSFlowDescr.listofFlows' was expected instead of `@NG_NAS_TypeDefs.QoS_FlowList