MM-57093 Update SCSS, Stylelint, and related packages (#26296)

* Update Stylelint and related packages

* Autofix CSS files

* Fix scss/no-global-function-names

* Fix scss/operator-no-unspaced

* Fix scss/comment-no-empty

* Disable scss/at-extend-no-missing-placeholder

* Update libraries for loading sass

* Fix Rollup not emitting the CSS for the components package to the right place

* Add plugin to re-add stylistic Stylelint rules

* Actually import Stylelint plugin

webapp/package.json

@@ -40,8 +40,8 @@
     "eslint-import-resolver-webpack": "0.13.2",
     "eslint-plugin-formatjs": "4.12.2",
     "mini-css-extract-plugin": "2.7.5",
-    "sass": "1.62.1",
-    "sass-loader": "13.2.2",
+    "sass": "1.71.1",
+    "sass-loader": "14.1.1",
     "strip-ansi": "6.0.1",
     "style-loader": "3.3.2",
     "webpack": "5.81.0",