### What problem does this PR solve?
Feat: Globally defined conversation variables can be selected in the
operator's query variables. #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: The keys for data manipulation operators can only be numbers,
letters, and underscores. #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: The value of data operations operators can be either input or
referenced from variables. #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Submit clean data operations form data to the backend. #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add a form with data operations operators #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
