Better Database and HTTP span recognition

Added

• Use db.stored_operation.name as one of the attributes to determine if two spans are the same. When it is present, ignore db.statement and db.query.text for the same purpose.

Changed

• Improve recognition of HTTP client spans. This will help our 'slow requests' feature recognize grouped HTTP client spans and improve our N+1 detection.

This release can be installed through our collector packages and Docker image.