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/src/components/cloud_start_trial/request_business_email_modal.scss

@@ -11,8 +11,8 @@
     .modal-content {
         padding: 0 !important;
         border-color: rgba(var(--center-channel-color-rgb), 0.16);
-        background: var(--center-channel-bg);
         border-radius: 8px;
+        background: var(--center-channel-bg);
         color: var(--center-channel-color);
     }
 
@@ -43,8 +43,8 @@
         height: 38px;
         padding: 0;
         border: 0;
-        background: var(--center-channel-bg) !important;
         border-radius: 8px;
+        background: var(--center-channel-bg) !important;
         color: var(--center-channel-color);
     }