refactor(rest): convert to byte collector

[ngjaying]

Support multiple formats like csv

[codecov]

Codecov Report

Attention: Patch coverage is 74.46809% with 12 lines in your changes missing coverage. Please review.

Project coverage is 70.93%. Comparing base (dc7a770) to head (d4d3312).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/io/http/client.go	58.33%	7 Missing and 3 partials ⚠️
internal/io/http/rest_sink.go	94.12%	1 Missing ⚠️
internal/pkg/httpx/http.go	66.67%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3275      +/-   ##
==========================================
- Coverage   70.93%   70.93%   -0.00%     
==========================================
  Files         396      396              
  Lines       44604    44585      -19     
==========================================
- Hits        31638    31623      -15     
- Misses      10447    10452       +5     
+ Partials     2519     2510       -9     

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