feat(httpc): added MetricsInterceptor in DoRequest

[Suyghur]

until now, MetricsInterceptor not used in httpc.

help to code review, plz~

@kevwan

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.11%. Comparing base (8690859) to head (f1d8a19).
Report is 159 commits behind head on master.

Additional details and impacted files

Files with missing lines	Coverage Δ
rest/httpc/requests.go	100.00% <100.00%> (ø)
rest/httpc/service.go	100.00% <100.00%> (ø)

... and 253 files with indirect coverage changes