fix(grpc): set service/method name into rpcinfo before OnReadStream

[felix021]

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fix

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en: OnReadStream was called before setting service/method name into rpcinfo.
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[codecov]

Codecov Report

Attention: Patch coverage is 47.05882% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 68.55%. Comparing base (d36f79e) to head (a4f7e13).

Files	Patch %	Lines
pkg/remote/trans/nphttp2/server_handler.go	47.05%	6 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1264      +/-   ##
===========================================
+ Coverage    68.48%   68.55%   +0.06%     
===========================================
  Files          285      285              
  Lines        20646    20646              
===========================================
+ Hits         14140    14153      +13     
+ Misses        5323     5313      -10     
+ Partials      1183     1180       -3     

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