Use string-quotes for rules that require quote fixes

[Mouvedia]

Reason

see #6558 (comment)

What Stylelint configuration is needed to reproduce the bug?

{
  "rules": {
    "function-url-quotes": "always",
    "string-quotes": "single",
  }
}

Challenges

Deprecation

string-quotes is a deprecated rule so the source of the data will disappear.
i.e. if we are not using the value of string-quotes we need to add an option to :

• font-family-name-quotes
• selector-attribute-quotes
• function-url-quotes
• etc.

Or don't deprecate string-quotes rule.

Order

Does the order matter?
i.e. when using --fix do we require to have set string-quotes before the rules that depends on the non-default value—'?

{
  "rules": {
    "string-quotes": "single",
    "function-url-quotes": "always",
  }
}

[jeddy3]

Let's stick with the current behaviour. We default to double quotes when autofixing and people can use their pretty-printer of choice to convert them if neccesary. Going forward, Stylelint isn't concerned with the type of quote, but rather where they occur.