test: add a custom command based log_upload workflow

[reubenmiller]

Proposed changes

Add a system tests which can demonstrate how to handle command based log_upload commands by overriding the default log_upload workflow, and add a pre-processing step which will generate the log file when called (the command could do something like talk to a database etc.)

It shows a working example that can be referenced to customers.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
476	0	3	476	100	1h14m21.839582999s

[didier-wenzek]

Approved

[gligorisaev]

The Test is doing what is supposed to do