feat: support Vectorizer can be used in workflow

[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

to support Vectorizer tool can run both in an agent app and a workflow app, changes:

• change the Vectorizer tool's input can be a File type for workflow, or a string type for the agent
• has file parameter's tool will not transfer to agent ---> has file parameter's tool and the parameter is required
• when the tool transfer to agent, the File type parameter will be ignored
• the download function of file can also download ToolFile and RemoteFile

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

test locally

• Test workflow app
• Test agent app