Bug fixed when using the decimal number in slidesToShow.

[nurullah]

Description (*)

Slick slider unofficially enables the use of decimal point in the slidesToShow attribute. When we define the 5.2 to the slidesToShow attribute, slick slider will show the 5 items and the 20 percent of 6 item. But we need to use undecimal number in the slidesToScroll parameter. Otherwise, the slider will miscalculate. This pull request aims to solve this problem.

Manual testing scenarios (*)

1. Set the default slidesToShow variable 4.5 in the view.xml (https://developer.adobe.com/commerce/frontend-core/page-builder/viewports/use-breakpoints/)
2. See the products slider will show the 4 product items and half of 5 product item.
3. Make sure it looks right when the slider moves to the next element.

Checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)