Feature Request: Support File Upload Parameter

[jackivanov]

Summary

Introduce a new parameter type: file upload. This parameter allows users to upload a file through the "Submit Workflow" UI panel or using argo cli. The uploaded file is automatically stored in the configured artifact storage and can be accessed within the workflow for processing.

parameters:
  - name: file
    valueFrom:
        upload: {}

Use Cases

1. Data Processing Workflows – Users can upload CSVs, JSON files, or other datasets that the workflow processes.
2. Model Training Pipelines – Users can provide training data directly from their local machine.
3. Configuration-based Jobs – Workflows that require YAML, JSON, or other config files can accept these dynamically during submission.
4. Secure and Temporary File Handling – No need to pre-stage files in external storage; files are uploaded only when a workflow is submitted.

Proposed UI/UX

• The "Submit Workflow" side panel will include an "Upload File" button next to parameters of this type.
• The selected file will be uploaded to the configured artifact repository.
• The workflow will receive a reference (e.g., S3 URL, MinIO path) to access the file.

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[shuangkun]

It sounds reasonable. Since the parameters can be changed when submitting the workflow, it seems that the file parameters should also be able to be changed.