Describe the bug
When apmotel package is imported spans cannot be compressed.

apmotel package override the apm context functions which calls span.TraceContext which marks the trace context as propagated. One of the requirement for a span to be eligible for compression is that the context is not propagated.

To Reproduce
A simple example like the one here with apmotel package imported.

Expected behavior
Spam should be eligible for compression when apmotel package is imported.