Ask Git Prompt Migration to AI Gateway

Ask Git Prompt needs to be moved to the AI Gateway. The overarching effort is tracked at Prompt Migration to AI Gateway (gitlab-org#14259 - closed).

More details in the thread at gitlab-org#14259 (comment 2082431536)

AIGW MR gitlab-org/modelops/applied-ml/code-suggestions/ai-assist!1523 (merged)
Rails MR !170659 (merged)
FF rollout #500896 (closed)

Edited Nov 19, 2024 by Alejandro Rodríguez