Fix obtaining remote application name on the server side

[finefuture]

What is the purpose of the change

1. Fix obtaining remote application name on the server side
2. Use enum instead of hardcode

Brief changelog

Verifying this change

Checklist

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 38.93%. Comparing base (b14e5e3) to head (bbec796).

Additional details and impacted files

@@            Coverage Diff             @@
##              3.3   #13811      +/-   ##
==========================================
+ Coverage   38.91%   38.93%   +0.01%     
==========================================
  Files        1897     1897              
  Lines       79317    79321       +4     
  Branches    11529    11530       +1     
==========================================
+ Hits        30866    30880      +14     
+ Misses      44132    44125       -7     
+ Partials     4319     4316       -3     

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[finefuture]

For example:

It should be handled in the same way as grpc-timeout, like this:

[AlbumenJ]

@oxsean @EarthChen @icodening PTAL

[EarthChen]

LGTM

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[oxsean]

Could you please add it in org.apache.dubbo.rpc.protocol.tri.h12.AbstractServerTransportListener#buildRpcInvocation
I think not only grpc need the consumerAppName.