node-api: add external buffer creation benchmark
Add a micro benchmark for external buffer creation. Since the node-api
buffer implementation is based on node::Buffer
, this micro benchmark
shows that the node::CleanupQueue
tracking has been a bottle neck
when frequently creating external buffers.
Refs: https://github.com/nodejs/node/issues/53804 Refs: https://github.com/nodejs/node/issues/44111