[Sync EN] Document legacy and clarify bestfit parameters for Imagick::resizeImage

PR: `https://github.com/php/doc-en/pull/5056` (2026-08-19)

**Файлы RU для обновления**
- `reference/imagick/imagick/adaptiveresizeimage.xml`
- `reference/imagick/imagick/cropthumbnailimage.xml`
- `reference/imagick/imagick/resizeimage.xml`
- `reference/imagick/imagick/scaleimage.xml`

