Sort out list-style-type non-spec keys

[jamesnw]

Specification

https://drafts.csswg.org/css-lists-3/#list-style-property

Description

In #1764 (comment), we discovered a number of BCD keys that are not mentioned in the spec, and have mixed current support. Once this is sorted out in BCD in this issue, we will need to resolve the keys in the list-style feature.

Browser support

No response

[jamesnw]

@ddbeck FYI, I opened mdn/browser-compat-data#25116 to set all the non-spec keys to "standard_track: false", which addresses the needs for web-features, but leaves open the question of the incorrect support data.

[jamesnw]

While work remains to sort out support of the non-standard keys, that won't impact Web Features, so this can be closed.