Replace unnecessary `FromTemplate` with `Default + Clone`. (#24440)

# Objective

- Fixes #24416.
- Deriving `Default + Clone` is preferred over deriving `FromTemplate`
when constructing the component doesn't refer to world/spawn context
according to the documents of `FromTemplate`.

## Solution

- I searched across repository, `ScrollbarThumb` is another type that
derives `FromTemplate` while all its fields are `Default + Clone`.
- Replace `FromTemplate` with `Default + Clone` on those types.