chore: refactor the beichuan model

[hjlarry]

Checklist:

Important

Please review the checklist below before submitting your pull request.

• Please open an issue before creating a PR or link to an existing issue
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

Description

currently, there is a lot of changes of beichuan API, this refactor include changes:

• remove deprecated models: baichuan2-turbo-192k, baichuan2-53b
• remove deprecated params: presence_penalty, frequency_penalty
• compatible the with_search_enhance
• support json_object
• support multi-tool-call
• support system role
• other code readablity optimizations

offical doc: https://platform.baichuan-ai.com/docs/api#12

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

Testing Instructions

local test in agent and workflow apps

• Test A
• Test B

[hjlarry]

the CI error seems not related to this PR, and not stable, why previous Run Pytest / API Tests (3.10) (pull_request) is passed