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/channels/.stylelintrc.json

@@ -1,7 +1,13 @@
 {
-    "extends": ["stylelint-config-recommended", "stylelint-config-standard", "stylelint-config-idiomatic-order", "stylelint-config-recommended-scss"],
+    "extends": [
+        "stylelint-config-idiomatic-order",
+        "stylelint-config-recommended-scss"
+    ],
+    "plugins": [
+        "@stylistic/stylelint-plugin"
+    ],
     "rules": {
-        "indentation": 4,
+        "@stylistic/indentation": 4,
         "no-descending-specificity": null,
         "font-family-no-missing-generic-family-keyword": null,
         "property-no-unknown": [
@@ -15,6 +21,8 @@
             {
                 "ignore": ["comments"]
             }
-        ]
+        ],
+        "scss/load-no-partial-leading-underscore": null,
+        "scss/at-extend-no-missing-placeholder": null
     }
 }