OpenTelemetry Trace context Global Propagators are default set to W3CTraceContextPropagator

[surbhigarg92]

Recent release introduced a feature E2E tracing which added the global propagator here

This should not be added as default in the SDK instead customers should add it.

A step-by-step description of how to reproduce the issue, based on the linked reproduction.

1. Enable E2E tracing as per sample observability-traces
2. Add Context propagation using any other propagators propagation.setGlobalPropagator(new CompositePropagator()());
3. Propagators will be overwritten

A clear and concise description of what the bug is, and what you expected to happen.

Propagators should not be added as default. This is a breaking behavior for customers already using propagators

This is recent change in 7.17.0

[github-actions]

Issue was opened with an invalid reproduction link. Please make sure the repository is a valid, publicly-accessible github repository, and make sure the url is complete (example: https://github.com/googleapis/google-cloud-node)