test: Fix external_ips test cleanup
test: Fix external_ips test cleanup

This test seems like it's always skipped, so who knows whether it works
or not. But this should at least mitigate issues with cleaning up state
at the end of the test, similar to the issues in the adjacent commits.

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@cilium.io>

michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium