Update dependency ai-gateway to v1.8.0

This MR contains the following updates:

Package	Update	Change
ai-gateway	minor	v1.7.0 -> v1.8.0

MR created with the help of gitlab-org/frontend/renovate-gitlab-bot

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Release Notes

gitlab-org/modelops/applied-ml/code-suggestions/ai-assist (ai-gateway)

v1.8.0

Compare Source

1.8.0 (2024-06-28)

Bug Fixes

• fix litellmchatmodel.generate to also handle messages of type str (bde41f5)
• litellm: fix the factory for chat container (76bc5ee)
• test: fix incorrect use of async warnings (a23edd8)
• update context limit to match monolith (2e59e52)

Features

• add autograph agents (4ec1d86)
• add test for ingestion scripts (aa3067d)
• allow CODE_GEMMA for generations (ac8acfe)
• allow codestral to be used for code generations and completions (f224afd)
• filter tools based on the user unit primitives (a0313ac)
• implement agent registry API endpoint (4354730)
• litellm: handle streams for litellm code completions (6282795)
• wrap langchain.ChatAnthropic in a custom class (40c9216)

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