Consistent call utilities

I haven't dug into the details so this may be off.

It looks like we have functions to generate calls in multiple packages. For example in `teal.slice` there are methods for the different classes. And in `teal.transform` there are a number of functions in `R/call_utils.R`. This seems redundant and to have a higher maintenance cost.

I know these functions are not exactly the same. But I think it's worth considering standardizing these functions somewhere to be used across teal. This feels similar to #787, insightsengineering/teal.slice/issues/120, insightsengineering/teal.reporter/pull/162.