feat: Updates tests to use fiveg_core_gnb interface (#493) #2143

Job	Run time
integration-test / integration-test	15m 21s
static-analysis / static-analysis	19s
codeql / CodeQL Analysis (python)	55s
lint-report / lint-report	18s
create-issue	0s
sync-issues / Update Issue	1s
	16m 54s

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