Configuration Functions for OpenTelemetry

[EranOfer]

Hi,

We are currently using a custom opentelemetry tracer in our application.
At the moment, we replace the global tracer during our custom go plugin initialization using the following code:

otel.SetTextMapPropagator(textMapPropagator)
otel.SetTracerProvider(tracerProvider)

While this approach works, it feels fragile and prone to issues.

I would like to suggest adding similar configuration functions in the Tyk library for better integration and stability.

Specifically, having functions like trace.SetTracerProvider and trace.SetTextMapPropagator in the github.com/TykTechnologies/opentelemetry/trace package would be very helpful.

This addition would allow for more seamless integration and configuration of the OpenTelemetry components within Tyk.

Thank you for considering this request.

Best regards,
Eran ofer