sdk/trace: removing ApplyConfig and Config

[ijsong]

This patch removes ApplyConfig method and Config struct from go.opentelemetry.io/otel/sdk/trace package. To ensure valid config for TracerProvider, it adds ensureValidTracerProviderConfig private function.

Jaeger and Zipkin have been used the Config directly across package boundaries. Since Config is removed, they can't use it. This change, thus, replaces WithSDK with WithSDKOptions.

Resolves #1636, #1705.

[codecov]

Codecov Report

Merging #1693 (57fd05a) into main (1d42be1) will increase coverage by 0.0%.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #1693   +/-   ##
=====================================
  Coverage   77.8%   77.9%           
=====================================
  Files        130     131    +1     
  Lines       7013    6997   -16     
=====================================
- Hits        5463    5451   -12     
+ Misses      1299    1296    -3     
+ Partials     251     250    -1     

Impacted Files	Coverage Δ
exporters/trace/jaeger/jaeger.go	93.5% <100.0%> (-0.3%)	⬇️
exporters/trace/zipkin/zipkin.go	72.9% <100.0%> (-0.4%)	⬇️
sdk/trace/config.go	100.0% <100.0%> (ø)
sdk/trace/provider.go	83.9% <100.0%> (+0.8%)	⬆️
sdk/trace/span.go	90.9% <100.0%> (ø)

[Aneurysm9]

I think I'd like to see a different solution to getting TracerProviderOptions from the exporter pipeline convenience methods to the TracerProvider initialization before landing this.

[Aneurysm9]

@ijsong sorry about the churn on this, there were several other issues working in the same area though I think we've made it through most of them.

@open-telemetry/go-approvers can we get another approval on this so we can land it?

[ijsong]

@Aneurysm9 No problem, I fixed some issues after merging main branch, and renamed field name defaultSampler to sampler to prepare #1702.