grpc instrument throw exception if a user set interceptor as tuple type.

[daniel-lee-sb]

Describe your environment

OS: (e.g, Ubuntu)
Python version: (e.g., Python 3.8.10)
Package version: (e.g., 0.46.0)

What happened?

The following method expects an interceptor of the list type, but some libraries pass interceptors as tuples. (Example: https://pypi.org/project/py-grpc-prometheus/)

I think it would be better to check type of change type as list.

    def _instrument(self, **kwargs):
        self._original_func = grpc.server
        tracer_provider = kwargs.get("tracer_provider")

        def server(*args, **kwargs):
            if "interceptors" in kwargs:
                # add our interceptor as the first
                kwargs["interceptors"].insert(
                    0,
                    server_interceptor(
                        tracer_provider=tracer_provider, filter_=self._filter
                    ),
                )
            else:
                kwargs["interceptors"] = [
                    server_interceptor(
                        tracer_provider=tracer_provider, filter_=self._filter
                    )
                ]
            return self._original_func(*args, **kwargs)

        grpc.server = server

Steps to Reproduce

You can download https://pypi.org/project/py-grpc-prometheus/.
And setup like the following.

server = grpc.server(futures.ThreadPoolExecutor(max_workers=10),
interceptors=(PromServerInterceptor(),))

/site-packages/opentelemetry/instrumentation/grpc/__init__.py", line 338, in server
   kwargs["interceptors"].insert(
 AttributeError: 'tuple' object has no attribute 'insert'

Expected Result

Even though the user sends an interceptor as tuple, grpc instrument should work as expected.

Actual Result

throw error because tuple does not have insert attribute.

Additional context

No response

Would you like to implement a fix?

Yes