event: workaround for https://github.com/libevent/libevent/issues/984. (#10666)
event: workaround for https://github.com/libevent/libevent/issues/984. (#10666)

This is affecting tests, introducing flakes.

Risk level: Low
Testing: CI

Signed-off-by: Harvey Tuch <c185081708e02336640916420d0c772668570de5@google.com>
istio/envoy,istio/envoy,lizan/envoy,envoyproxy/envoy,istio/envoy,istio/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lizan/envoy,lyft/envoy,lizan/envoy,envoyproxy/envoy,istio/envoy,lizan/envoy,envoyproxy/envoy-wasm,lyft/envoy,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lyft/envoy,envoyproxy/envoy,istio/envoy,lyft/envoy,envoyproxy/envoy,lizan/envoy