[Bug]: The API calls of assistant actions using wrong base URL

[VPCU]

What happened?

Assistants fail to run actions because the API calls use wrong base URL.

According to OpenAPI 3.0 documents,

All API endpoints are relative to the base URL. For example, assuming the base URL of https://api.example.com/v1, the /users endpoint refers to https://api.example.com/v1/users.
In OpenAPI 3.0, you use the servers array to specify one or more base URLs for your API.

Steps to Reproduce

In assistant builder, add an action with the schema:

openapi: 3.0.1
servers:
  - url: https://example.com/a/b/c
paths:
  /d:
...

The action would throw an error like "Request failed with status code 404".

However the following schema works:

openapi: 3.0.1
servers:
  - url: https://example.com
paths:
  /a/b/c/d:
...

What browsers are you seeing the problem on?

Chrome

Relevant log output

debug: [required actions] user: <> | thread_id: <>| run_id: <>
["{\"tool\":\"<>\",\"toolInput\":<>... [truncated]"]

error: Request failed with status code 404

Screenshots

No response

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