fix: throttleHost is not array in ExternalRateLimit #2233

Job	Run time
Shellcheck	6s
Lint	2m 33s
Go build	2m 44s
Chart checks	8s
Docker Images	0s
Codegen	4m 15s
Scan images for security vulnerabilities	5m 13s
Mocks	2m 14s
Go test	6m 55s
Go mesh test e2e (1, ubuntu-22.04)	35m 39s
Go gateway test e2e (6, latest, ubuntu-22.04)	19m 2s
Go ingress test e2e (10)	18m 18s
Go mesh test e2e (2, ubuntu-22.04)	43m 12s
Go gateway test e2e (6, v1.19.16-k3s1, ubuntu-20.04)	20m 36s
Go mesh test e2e (3, ubuntu-22.04)	42m 52s
Go gateway test e2e (6, v1.21.14-k3s1, ubuntu-22.04)	22m 13s
Integration Test with Tresor, SMI traffic policies, and egress disabled	13m 7s
Go mesh test e2e (4, ubuntu-22.04)	41m 33s
Go gateway test e2e (6, v1.23.17-k3s1, ubuntu-22.04)	21m 8s
Go mesh test e2e (5, ubuntu-22.04)	41m 12s
Go gateway test e2e (7, latest, ubuntu-22.04)	19m 48s
Go mesh test e2e (v1.19.16-k3s1, Test traffic flowing from client to server with a Kubernetes Ser...	12m 31s
Go gateway test e2e (7, v1.19.16-k3s1, ubuntu-20.04)	20m 5s
Go mesh test e2e (v1.27.16-k3s1, Test traffic flowing from client to server with a Kubernetes Ser...	12m 55s
Go statefulset test e2e (8)	13m 53s
Go retry test e2e (9)	14m 7s
	7h 16m 19s

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