fix compiling error on macos caused by 'DVLOG_IF'

Grpc support

Replace InternalReset/DeleteStuff with ResetPods/NonPods & Save protocol-param in thrift_method_name which is rarely used

fix read_invariant_cpu_frequency

* Delete trailer map
* Convert H2Error and grpc error to ErrorCode

* add grpc sanity and exception UT

* client can receive grpc error code and message
* add percent encode/decode