Preserve empty lines in CSS/SCSS paren groups

[duailibe]

Description

Related to #12053, will improve the comment placement from the example in another PR

Checklist

• I’ve added tests to confirm my change works.
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
• (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md.
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[sosukesuzuki]

Can you add tests for multi empty lines?

Prettier pr-12210
Playground link

--parser scss

Input:

$colours: (
    "text": $light-100,
    "background-primary": $dark-300,






    "background-secondary": $dark-200,
    "background-tertiary": $dark-100
);

Output:

$colours: (
  "text": $light-100,
  "background-primary": $dark-300,

  "background-secondary": $dark-200,
  "background-tertiary": $dark-100,
);