[BUG]: opentelemetry incorrectly setting up trace_flags

[cvolante54]

Tracer Version(s)

2.21.3

Python Version(s)

3.12.7

Pip Version(s)

24.0

Bug Report

When using google-pubsub opentelemetry feature with ddtrace's opentelemtry provider, I exposed an issue with the current implementation of the OpenTelemetry Span in this library. The following line in google-pubsub

https://github.com/googleapis/python-pubsub/blob/main/google/cloud/pubsub_v1/publisher/_batch/thread.py#L250

span.get_span_context().trace_flags.sampled

Results in an "AttributeError: 'int' object has no attribute 'sampled'" error.

The root cause of the issue is in the following lines:

https://github.com/DataDog/dd-trace-py/blob/main/ddtrace/internal/opentelemetry/span.py#L148-L156

In this case TraceFlags.SAMPLED or TraceFlags.DEFAULT return an integer, not a TraceFlags instance, in order to get a TraceFlags instance you need to call TraceFlags.get_default() or TraceFlags(TraceFlags.SAMPLED), check the source code out here:

https://github.com/open-telemetry/opentelemetry-python/blob/main/opentelemetry-api/src/opentelemetry/trace/span.py#L197-L221

Reproduction Code

No response

Error Logs

No response

Libraries in Use

ddtrace: 2.21.3
opentelemetry: 1.30.0
google-cloud-pubsub: 2.28.0

Operating System

No response