refact(nrf): use new YAML configuration

build/scripts/nrf_conf.sh

etc/config.yaml

etc/nrf.conf

src/api-server/CMakeLists.txt

src/api-server/api/AccessTokenRequestApi.cpp

src/api-server/api/CompleteStoredSearchDocumentApi.cpp

src/api-server/api/DiscNFInstancesStoreApi.cpp

src/api-server/api/NFInstanceIDDocumentApi.cpp

src/api-server/api/NFInstancesStoreApi.cpp

src/api-server/api/StoredSearchDocumentApi.cpp

src/api-server/api/SubscriptionIDDocumentApi.cpp

src/api-server/api/SubscriptionsCollectionApi.cpp

src/api-server/impl/NFInstanceIDDocumentApiImpl.cpp

src/api-server/impl/SubscriptionsCollectionApiImpl.cpp

src/api-server/nrf-http2-server.cpp

src/common/utils/conversions.cpp

src/common/utils/conversions.hpp

src/nrf_app/CMakeLists.txt

src/nrf_app/nrf_app.cpp

src/nrf_app/nrf_app.hpp