Add support for DB2 for IBM i ODBC (AS400)

[tonymorello]

What type of PR is this?

• [ ] Refactor
• [ ] Feature
• [ ] Bug Fix
• [x] New Query Runner (Data Source)
• [ ] New Alert Destination
• [ ] Other

Description

Adds support for DB2 on IBM System i (formerly AS400) using ODBC/pyodbc since it was already included for other query runners (i.e. SQL Server)

How is this tested?

• [ ] Unit tests (pytest, jest)
• [ ] E2E Tests (Cypress)
• [x] Manually
• [ ] N/A

Tested by committing the changes to the base docker container/image.

Related Tickets & Documents

Mobile & Desktop Screenshots/Recordings (if there are UI changes)