[WIP] AO-16209 OT trace provider

[jiwen624]

No description provided.

[codecov-io]

Codecov Report

Merging #145 into master will decrease coverage by 4.49%.
The diff coverage is 46.15%.

@@            Coverage Diff             @@
##           master     #145      +/-   ##
==========================================
- Coverage   81.97%   77.48%   -4.50%     
==========================================
  Files          37       35       -2     
  Lines        4583     4526      -57     
==========================================
- Hits         3757     3507     -250     
- Misses        703      872     +169     
- Partials      123      147      +24     

Impacted Files	Coverage Δ
v1/ao/context.go	100.00% <ø> (ø)
v1/ao/internal/reporter/event.go	96.57% <ø> (-1.15%)	⬇️
v1/ao/opentracing/tracer.go	100.00% <ø> (ø)
v1/contrib/aogrpc/interceptors.go	9.60% <0.00%> (-0.83%)	⬇️
v1/ao/trace.go	59.75% <58.33%> (-24.00%)	⬇️
v1/ao/internal/reporter/context.go	75.82% <60.00%> (-18.04%)	⬇️
v1/ao/layer.go	75.15% <65.00%> (-10.76%)	⬇️
v1/ao/internal/reporter/reporter.go	80.37% <100.00%> (ø)
v1/ao/opentracing/propagation.go	100.00% <100.00%> (ø)
v1/ao/internal/reporter/test_reporter.go	60.71% <0.00%> (-20.01%)	⬇️
... and 7 more

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