[Feature Request]: Use `cad##` datasets exported in `random.cdisc.data` for faster local apps

### Feature description

The datasets in most if not all the teal.gallery apps generate random cdisc data that makes running them locally very slow.

We could use the already exported cached datsets (`cad##`) instead of `rad##(ADSL, seed = 1)`.

https://insightsengineering.github.io/random.cdisc.data/main/reference/index.html#cached-datasets

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct.

### Contribution Guidelines

- [x] I agree to follow this project's Contribution Guidelines.

### Security Policy

- [x] I agree to follow this project's Security Policy.

Start by locating where the teal.gallery apps generate random CDISC data with rad##(ADSL, seed = 1). Review the random.cdisc.data cached-datasets reference for the cad## datasets, then identify the affected apps and replace the local data source. Done means the apps use the cached datasets and run faster locally.

Written by the indexing model from the issue text.