fix: add missing UpdateEgressIPAddress to mockWorkerRepo in agent tests #19

Job	Run time
lint + dry-run 6 scenarios	13s
uat scenario=custom-ip	5s
uat scenario=loopback-only	5s
uat scenario=lan-only	4s
uat scenario=custom-domain	5s
uat scenario=fail-closed-pkill	7s
uat scenario=loopback-lan	4s
	43s

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