[OpenTelemetry] Edge cases for parsing OTEL_TRACES_SAMPLER_ARG#7103

rajkumar-rangaraj merged 4 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-dotnet:mainfrom

Kielek:fix-sampler-env-varKielek/opentelemetry-dotnet:fix-sampler-env-varCopy head branch name to clipboard