Upgrade to the new version of Sonnet 3.5

Anthropic recently announced an upgraded version of Claude 3.5 Sonnet. We should work to upgrade our code generation feature to use this new version. This is the claude-3.5-sonnet-20241022 version.

From Anthropic:

The upgraded Claude 3.5 Sonnet delivers across-the-board improvements over its predecessor, with particularly significant gains in coding—an area where it already led the field.

Implementation Steps

• Update the AI Gateway if needed
• Change the Code Suggestions / Code Generation processing to use the new version
• Verify the new model with ELI5
• Update the documentation as needed

Rollout Plan

TBD - We will need to decide we need to add this behind a feature flag, or if it is more of a minor update that we can just roll out.