Add instrumentation for AWS Redshift databases

I followed the basic steps described on the documentation to connect my Flask application. My application connects with a MySql database and with Redshift database. On Kibana web page, when analyzing the data I can see the query statement for the MySql querys, but I can't see the Redshift query statement. On my application, both database connection are made with SQLAlchemy. So is just a question, does it work with Redshift? Maybe I have to check some of my settings, read some advanced topics.

I tried to create a span (`@elasticapm.capture_span()`) on the Redshift method that execute the query to be more specific and visualize what was happening, but still on kibana it show my Redshift span but no query statement.

**Environment **
- OS: Ubuntu 22.04
- Python version: 3.11
- Framework and version: Flask 2.2
- APM Server version:
- Agent version: 6.16.2

まず、Flask、SQLAlchemy、Redshift接続を使って報告されたセットアップを再現し、次に、そのスパンを、Kibanaですでにクエリステートメントを表示しているMySQLのスパンと比較します。RedshiftのクエリステートメントがKibanaに表示され、その動作が回帰テストでカバーされれば、Issueは完了です。

索引モデルが issue の本文から書いたものです。