fix(celery): Close the connection we're reading driver_type from (#5427)

Currently, we're reading the driver type (e.g. `redis`) from a
connection. We're however not closing the connection, potentially
causing file descriptor leaks.

**Aside:** Opening a connection just for the purpose of determining the
driver type is not ideal in the first place. We should see whether we
can get the info from elsewhere from the context of a task's
`run`/`__call__` (which is where we're enriching the span with it). Or
we could see whether we can cache this somehow.

For now, let's at least make sure to clean up the connection.

#### Issues
Closes #5422

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Author: sentrivana

sentry_sdk/integrations/celery/__init__.py

@@ -392,10 +392,11 @@ def _inner(*args: "Any", **kwargs: "Any") -> "Any":
                     )
 
                 with capture_internal_exceptions():
-                    span.set_data(
-                        SPANDATA.MESSAGING_SYSTEM,
-                        task.app.connection().transport.driver_type,
-                    )
+                    with task.app.connection() as conn:
+                        span.set_data(
+                            SPANDATA.MESSAGING_SYSTEM,
+                            conn.transport.driver_type,
+                        )
 
                 return f(*args, **kwargs)
         except Exception: