Align parameter description of all index-based array methods

[Josh-Cena]

Description

Adding on to https://github.com/mdn/content/pull/22180. Consistently explain how the parameters are normalized in all edge cases.

Motivation

Additional details

Related issues and pull requests

[github-actions[bot]]

Preview URLs (10 pages)

• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/at
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/copyWithin
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fill
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/lastIndexOf
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Number

(this comment was updated 2022-11-10 02:51:38.869938)

[Josh-Cena]

I will wait for a few days to get feedback from @teoli2003; in any case, after a few days we can go ahead and merge this (and close #21349)