Generate OpenAPI client so it has CreateABChatCompletion method (#7)

Regenerate the OpenAPI client so that it has the
`CreateABChatCompletion` method. Some other methods are along for the
ride.

Also update the version: v0.3.0 -> v0.4.0

Merge pull request #6 from gofixpoint/dylan/traces-and-attrs

Update OpenAPI client for better tracing and log attribute creation (v0.3.0)

Merge pull request #4 from gofixpoint/dylan/multi-llm

Add CreateMultiLLMChatCompletion method

Upload test packages to legacy repository (#3)