ci: default external flags in ConformanceKindEnvoyDaemonSet

This commit removes the flags `external-*` from the connectivity tests
in ConformanceKindEnvoyDaemonSet. Therefore the defaults are used.

This should stabilize the execution of the check on GHA.

Signed-off-by: Marco Hofstetter <marco.hofstetter@isovalent.com>

.github/workflows/conformance-kind-proxy-daemonset.yaml

@@ -76,8 +76,7 @@ jobs:
             --helm-set=bpf.monitorAggregation="none" \
             --wait=false \
             --version="
-          CONNECTIVITY_TEST_DEFAULTS="--flow-validation=disabled --hubble=false --collect-sysdump-on-failure \
-            --external-target bing.com --external-cidr 8.0.0.0/8 --external-ip 8.8.8.8 --external-other-ip 8.8.4.4"
+          CONNECTIVITY_TEST_DEFAULTS="--flow-validation=disabled --hubble=false --collect-sysdump-on-failure"
           echo cilium_install_defaults=${CILIUM_INSTALL_DEFAULTS} >> $GITHUB_OUTPUT
           echo connectivity_test_defaults=${CONNECTIVITY_TEST_DEFAULTS} >> $GITHUB_OUTPUT
           echo sha=${SHA} >> $GITHUB_OUTPUT