Remove Agent Debug Info (elastic#187126)

## Summary

- Removes SSH info to avoid confusion since we cannot SSH into agents on
the new infra
- Removes old agent metrics and logs links because they are in a
different cluster and the new links are in an annotation

(cherry picked from commit dd9d643)

.buildkite/scripts/lifecycle/post_command.sh

@@ -6,13 +6,6 @@ echo '--- Log out of gcloud'
 ./.buildkite/scripts/common/activate_service_account.sh --unset-impersonation || echo "Failed to unset impersonation"
 ./.buildkite/scripts/common/activate_service_account.sh --logout-gcloud || echo "Failed to log out of gcloud"
 
-if [[ "${SKIP_NODE_SETUP:-}" =~ ^(1|true)$ ]]; then
-  echo '--- Skipping Agent Debug Info'
-else
-  echo '--- Agent Debug Info'
-  ts-node .buildkite/scripts/lifecycle/print_agent_links.ts || true
-fi
-
 IS_TEST_EXECUTION_STEP="$(buildkite-agent meta-data get "${BUILDKITE_JOB_ID}_is_test_execution_step" --default '')"
 
 if [[ "$IS_TEST_EXECUTION_STEP" == "true" ]]; then

.buildkite/scripts/lifecycle/pre_command.sh

@@ -11,16 +11,6 @@ if [[ "${SKIP_NODE_SETUP:-}" =~ ^(1|true)$ ]]; then
 else
   source .buildkite/scripts/common/setup_node.sh
   source .buildkite/scripts/common/setup_buildkite_deps.sh
-
-  echo '--- Agent Debug/SSH Info'
-  ts-node .buildkite/scripts/lifecycle/print_agent_links.ts || true
-fi
-
-if [[ "$(curl -is metadata.google.internal || true)" ]]; then
-  echo ""
-  echo "To SSH into this agent, run:"
-  echo "gcloud compute ssh --tunnel-through-iap --project elastic-kibana-ci --zone \"$(curl -sH Metadata-Flavor:Google http://metadata.google.internal/computeMetadata/v1/instance/zone)\" \"$(curl -sH Metadata-Flavor:Google http://metadata.google.internal/computeMetadata/v1/instance/name)\""
-  echo ""
 fi
 
 if [[ "${BUILDKITE_LABEL:-}" == *"Run Dynamic Pipeline"* || "${BUILDKITE_LABEL:-}" == *"Upload Pipeline"* ]]; then