Refactor configs

[pellared]

Partially solves: #536

Why

Follow standards affecting exported API before RC.

What

Unify the configuration and options API in accordance to: https://github.com/open-telemetry/opentelemetry-go/blob/main/CONTRIBUTING.md#configuration

Refactor option and config types in:

• sdk/trace/provider.go
• sdk/trace/sampling.go
• sdk/metric/controller/basic/config.go
• sdk/metric/aggregator/histogram/histogram.go
• sdk/metric/processor/basic/config.go
• sdk/resource/config.go
• trace/config.go POSTPONED - requires major refactoring as New*Config functions are exported and used in other packages
• metric/config.go POSTPONED - requires major refactoring
• oteltest/config.go
• exporters/otlp/options.go
• exporters/otlp/protocoldriver.go
• exporters/otlp/otlpgrpc/options.go
• exporters/otlp/otlphttp/options.go
• exporters/stdout/config.go
• exporters/trace/jaeger/uploader.go
• exporters/trace/zipkin/zipkin.go

"Codecov/patch" fails, because of the refactoring. The test coverage from the logical perspective remains the same.

Next PR(s)

Try tackling trace/config.go and metric/config.go.

[codecov]

Codecov Report

Merging #1882 (d6ef32c) into main (6324ada) will increase coverage by 0.0%.
The diff coverage is 70.0%.

@@          Coverage Diff          @@
##            main   #1882   +/-   ##
=====================================
  Coverage   79.4%   79.5%           
=====================================
  Files        139     139           
  Lines       7452    7463   +11     
=====================================
+ Hits        5921    5937   +16     
+ Misses      1283    1278    -5     
  Partials     248     248           

Impacted Files	Coverage Δ
exporters/stdout/metric.go	76.3% <ø> (ø)
exporters/stdout/trace.go	69.5% <ø> (ø)
sdk/resource/config.go	100.0% <ø> (+9.0%)	⬆️
exporters/otlp/otlpgrpc/options.go	46.3% <44.8%> (+1.3%)	⬆️
exporters/otlp/otlphttp/options.go	57.6% <56.0%> (+1.6%)	⬆️
exporters/stdout/config.go	70.0% <62.5%> (+16.1%)	⬆️
exporters/trace/jaeger/uploader.go	50.0% <62.5%> (-0.7%)	⬇️
exporters/trace/zipkin/zipkin.go	73.0% <83.3%> (+0.1%)	⬆️
exporters/otlp/options.go	100.0% <100.0%> (ø)
exporters/otlp/otlp.go	83.9% <100.0%> (ø)
... and 13 more