Log method name for monitoring_over_header connection event
Log method name for monitoring_over_header connection event

Summary:
We already do this for rocket. Let's do it for header as well.
https://www.internalfb.com/code/fbsource/[29de5f28afa4a06c37fbb2e5e75e545066006cc7]/fbcode/thrift/lib/cpp2/transport/rocket/server/ThriftRocketServerHandler.cpp?lines=434-437

Reviewed By: yfeldblum

Differential Revision: D27936293

fbshipit-source-id: ee621547e270d35e8c13a952f69461577b649c1a

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