refactor(generic): refactor existing generic to have new ServiceInfo which has the generic's reader and writer info directly

[Marina-Sakai]

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refactor

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[codecov]

Codecov Report

Attention: Patch coverage is 67.40741% with 88 lines in your changes missing coverage. Please review.

Project coverage is 70.56%. Comparing base (b9d6a55) to head (2cd2091).
Report is 11 commits behind head on develop.

❗ Current head 2cd2091 differs from pull request most recent head 00251a9

Please upload reports for the commit 00251a9 to get more accurate results.

Files	Patch %	Lines
pkg/generic/generic_service.go	58.13%	14 Missing and 4 partials ⚠️
pkg/generic/generic.go	76.92%	8 Missing and 4 partials ⚠️
pkg/generic/thrift/json.go	0.00%	10 Missing ⚠️
pkg/generic/proto/json.go	0.00%	8 Missing ⚠️
pkg/generic/httppbthrift_codec.go	50.00%	7 Missing ⚠️
pkg/generic/jsonthrift_codec.go	72.00%	5 Missing and 2 partials ⚠️
pkg/generic/thrift/struct.go	36.36%	6 Missing and 1 partial ⚠️
pkg/generic/httpthrift_codec.go	85.71%	4 Missing and 1 partial ⚠️
pkg/generic/jsonpb_codec.go	68.75%	4 Missing and 1 partial ⚠️
pkg/generic/thrift/http.go	50.00%	3 Missing ⚠️
... and 3 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1365      +/-   ##
===========================================
+ Coverage    70.43%   70.56%   +0.13%     
===========================================
  Files          293      293              
  Lines        21155    21196      +41     
===========================================
+ Hits         14900    14957      +57     
- Misses        5017     5018       +1     
+ Partials      1238     1221      -17     

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