fix: code result error for set and update syntax for some set/map page

[JasonLamv-t]

Description

1. Fix code result error in set.@@iterator and improve another code example in set.clear, according to preview comments in [zh-cn]: update the translation of Set constructor&@@iterator()&@@species translated-content#16466 (comment) and [zh-cn]: update the translation of Set.add()&clear()&delete()&has() translated-content#16479 (comment).
2. Update the syntax part of the pages of set&map 's instance methods, to unify @Josh-Cena's recent changes which clear these methods are instances' methods.

Motivation

Ditto.

Additional details

Related issues and pull requests

[github-actions]

Preview URLs (17 pages)

• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/@@iterator
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/clear
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/entries
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/forEach
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/has
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/keys
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/set
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/values
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/@@iterator
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/add
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/clear
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/entries
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/forEach
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/has
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/keys
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/values

[Josh-Cena]

Hi! This is not how syntax boxes work. We don't add the prefix unless the method's name is a keyword, because with() is not a function call. This is not a problem with the methods here.