docs(api): Clarify relationship between get/has/setAttribute() methods for attribute values, nodes & namespaced attrs

[bsmth]

Description

This PR directs readers to non-namespaced and non-Attr variants of the Attribute methods (get, set, has, remove).

Additions:

• "See also" sections listing complementary methods

Removals:

• {{DOMAttributeMethods}} table

Motivation

Clarify the differences between these methods and remove {{DOMAttributeMethods}} macro.

Additional details

See Discussion: https://github.com/orgs/mdn/discussions/638

Failing builds

There is an issue following #31265. I am committing using git commit --no-verify ... to skip local checks.

[github-actions]

Preview URLs (16 pages)

• /en-US/docs/Web/API/Attr
• /en-US/docs/Web/API/Element/getAttributeNS
• /en-US/docs/Web/API/Element/getAttributeNodeNS
• /en-US/docs/Web/API/Element/getAttributeNode
• /en-US/docs/Web/API/Element/getAttribute
• /en-US/docs/Web/API/Element/hasAttributeNS
• /en-US/docs/Web/API/Element/hasAttribute
• /en-US/docs/Web/API/Element/hasAttributes
• /en-US/docs/Web/API/Element/removeAttributeNS
• /en-US/docs/Web/API/Element/removeAttributeNode
• /en-US/docs/Web/API/Element/removeAttribute
• /en-US/docs/Web/API/Element/setAttributeNS
• /en-US/docs/Web/API/Element/setAttributeNodeNS
• /en-US/docs/Web/API/Element/setAttributeNode
• /en-US/docs/Web/API/Element/setAttribute
• /en-US/docs/Web/API/Element/toggleAttribute

[wbamberg]

👍 nice

[bsmth]

Thank you!