bgpv2/ci: added watch reactor for bgp cluster config

[harsimran-pabla]

Wait for BGPClusterConfig and CiliumNodes watcher to initialize before starting the tests.

Fixes: #31054, #31363

[harsimran-pabla]

/test

[rastislavs]

LGTM, thanks!

[harsimran-pabla]

AWS-CNI test failed to create cluster.

Error: failed to create cluster "cilium-cilium-8268424990-1"
2024-03-13 17:07:47 [!]  1 error(s) occurred and cluster hasn't been created properly, you may wish to check CloudFormation console
2024-03-13 17:07:47 [ℹ]  to cleanup resources, run 'eksctl delete cluster --region=us-east-2 --name=cilium-cilium-8268424990-1'
2024-03-13 17:07:47 [✖]  error creating Clientset: getting list of API resources for raw REST client: the server has asked for the client to provide credentials

[harsimran-pabla]

ci-ginkgo failure : #31147

[harsimran-pabla]

IPsec tests failing because of quay timeouts

Error: cannot pull image quay.io/lvh-images/kind:5.10-20240305.092417: Error response from daemon: Get "https://quay.io/v2/": net/http: request canceled (Client.Timeout exceeded while awaiting headers)

[harsimran-pabla]

Another IPSec test failure (client-egress-l7) :
#27762

[.] Action [client-egress-l7/pod-to-pod/curl-ipv4-2: cilium-test/client2-ccd7b8bdf-dzqvc (10.244.1.200) -> cilium-test/echo-other-node-5d67f9786b-lfjb6 (10.244.2.123:8080)]
  ❌ command "curl -w %{local_ip}:%{local_port} -> %{remote_ip}:%{remote_port} = %{response_code} --silent --fail --show-error --output /dev/null --connect-timeout 2 --max-time 10 http://10.244.2.123:8080/" failed: error with exec request (pod=cilium-test/client2-ccd7b8bdf-dzqvc, container=client2): command terminated with exit code 28

[aditighag]

Merging the fix based on @harsimran-pabla's confirmation that it's ready.