Remove leftover `disable-gitops` mentions #4141

Job	Run time
e2e-fleet-test (v1.30.2-k3s2, default)	9m 51s
e2e-fleet-test (v1.30.2-k3s2, sharding, [{"id":"shard0"},{"id":"shard1"},{"id":"shard2"}])	6m 35s
e2e-fleet-test (v1.30.2-k3s2, infra-setup)	10m 2s
e2e-fleet-test (v1.24.17-k3s1, default)	11m 8s
e2e-fleet-test (v1.24.17-k3s1, sharding, [{"id":"shard0"},{"id":"shard1"},{"id":"shard2"}])	11m 2s
e2e-fleet-test (v1.24.17-k3s1, infra-setup)	10m 35s
	59m 13s

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