opentelemetry-instrumentation-dbapi: instrument commit and rollback

[bmwalters]

Description

Adds instrumentation for database commit() and rollback() transaction operations across all DB-API instrumentations.

Type of change

• New feature (non-breaking change which adds functionality)

Changes

• Added commit() and rollback() span instrumentation to dbapi module
• Added enable_transaction_spans configuration flag (default: True)
• Created AsyncTracedConnectionProxy for async connections (psycopg)
• Plumbed configuration through all dependent instrumentors: pymysql, mysql, mysqlclient, psycopg, psycopg2, sqlite3, pymssql

How Has This Been Tested?

• Added unit tests for sync commit/rollback in test_dbapi_integration.py
• Added unit tests for sync and async commit/rollback in test_psycopg_integration.py
• Added functional tests for pymysql in test_pymysql_functional.py
• All existing tests pass

Does This PR Require a Core Repo Change?

• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: bmwalters / name: Bradley Walters (a2e9819)