Migrate anisotropy to feathers

[tevans-3]

Objective

Addresses one part of #25032

Solution

• Switch the 3d/anisotropy.rs example to use Feathers checkboxes and radios and use the refactored checkbox helper

Blocked on #25527

Supersedes #25494

Testing

cargo run --example anisotropy --features="bevy_feathers jpeg pbr_anisotropy_texture"

anisotropy.mp4