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/webpack.config.js

@@ -23,7 +23,7 @@ const NPM_TARGET = process.env.npm_lifecycle_event;
 const targetIsRun = NPM_TARGET?.startsWith('run');
 const targetIsStats = NPM_TARGET === 'stats';
 const targetIsDevServer = NPM_TARGET?.startsWith('dev-server');
-const targetIsEslint = NPM_TARGET === 'check' || NPM_TARGET === 'fix' || process.env.VSCODE_CWD;
+const targetIsEslint = NPM_TARGET?.startsWith('check') || NPM_TARGET === 'fix' || process.env.VSCODE_CWD;
 
 const DEV = targetIsRun || targetIsStats || targetIsDevServer;