Fix all stylelint errors (#23920)

* Fix all stylelint errors

For any errors that fixing would require changing the output of the css disable stylelint for that line instead of modifying.

* Update quality.py

Make stylelint quality check pass when there are no errors

* Delete empty selectors

cms/static/sass/elements/_creative-commons.scss

@@ -1,7 +1,8 @@
 @font-face {
   font-family: 'CreativeCommons';
   src: url('#{$static-path}/fonts/CreativeCommons/cc.eot');
-  src: url('#{$static-path}/fonts/CreativeCommons/cc.eot#iefix') format('embedded-opentype'),
+  src:
+    url('#{$static-path}/fonts/CreativeCommons/cc.eot#iefix') format('embedded-opentype'),
     url('#{$static-path}/fonts/CreativeCommons/cc.woff') format('woff'),
     url('#{$static-path}/fonts/CreativeCommons/cc.ttf') format('truetype'),
     url('#{$static-path}/fonts/CreativeCommons/cc.svg#CreativeCommons') format('svg');

cms/static/sass/elements/_modal-window.scss

@@ -219,6 +219,7 @@
           color: $blue-d4;
         }
       }
+
       .clipboard-button {
         position: absolute;
         right: 30px;