Initialize the tag producer so we get some tag extraction happening and counted toward (#4907)
Initialize the tag producer so we get some tag extraction happening and counted toward (#4907)

the memory usage in the unit test.

Signed-off-by: Joshua Marantz <c3f6b7d9de5243f9f0884ee043fd42ff9df5f177@google.com>
dnoe/envoy,lizan/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,jrajahalme/envoy,envoyproxy/envoy,envoyproxy/envoy,jrajahalme/envoy,lyft/envoy,lizan/envoy,envoyproxy/envoy,dnoe/envoy,lyft/envoy,istio/envoy,istio/envoy,jrajahalme/envoy,dnoe/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,dnoe/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,lizan/envoy,envoyproxy/envoy-wasm,istio/envoy,lyft/envoy,lyft/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,jrajahalme/envoy,dnoe/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,istio/envoy,jrajahalme/envoy,lizan/envoy,istio/envoy,lizan/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,istio/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy,lyft/envoy,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy,eklitzke/envoy,lyft/envoy,eklitzke/envoy