Make sure database instrumentations follow semantic conventions

[srikanthccv]

Semantic conventions for database client calls https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/database.md

• Make sure sqlite3 instrumentation follows semantic conventions #1625
• Make sure sqlalchemy instrumentation follows semantic conventions #1626
• Make sure redis instrumentation follows semantic conventions #1627
• Make sure pymysql instrumentation follows semantic conventions #1628
• Make sure pymongo instrumentation follows semantic conventions #1629
• Make sure pymemcache instrumentation follows semantic conventions #1630
• Make sure psycopg2 instrumentation follows semantic conventions #1631
• Make sure mysql instrumentation follows semantic conventions #1632
• Make sure elasticsearch instrumentation follows semantic conventions #1633
• Make sure dbapi instrumentation follows semantic conventions #1634
• Make sure asyncpg instrumentation follows semantic conventions #1635
• Make sure aiopg instrumentation follows semantic conventions #1636

[huwaizatahir2]

@lzchen can you please assign this issue to me