[feature request] TraceContextPropagator supports W3C randomness flags

[Kielek]

Package

OpenTelemetry.Api

Is your feature request related to a problem?

There is a new specification release v1.52.0. It brings open-telemetry/opentelemetry-specification#4761.

What is the expected behavior?

.NET propagators handles randomness flags.
As I remember there is also implementation under runtime. We need to request changes.

Which alternative solutions or features have you considered?

N/A

Additional context

Propagator is under: https://github.com/open-telemetry/opentelemetry-dotnet/blob/6ef37294aa86b02a901aeaaa5ce0b9fc900498ab/src/OpenTelemetry.Api/Context/Propagation/TraceContextPropagator.cs

There is a chance that we need to update also

opentelemetry-dotnet/test/OpenTelemetry.Instrumentation.W3cTraceContext.Tests/Dockerfile

Line 12 in 6ef3729

RUN git clone --branch level-1 https://github.com/w3c/trace-context.git

to level 2 to have coverage about this feature.

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