Add .no-gutters option to remove gutters from rows (#21211)

Fixes #19107.

scss/_grid.scss

@@ -28,6 +28,18 @@
   .row {
     @include make-row();
   }
+
+  // Remove the negative margin from default .row, then the horizontal padding
+  // from all immediate children columns (to prevent runaway style inheritance).
+  .no-gutters {
+    margin-right: 0;
+    margin-left: 0;
+
+    > [class*="col-"] {
+      padding-right: 0;
+      padding-left: 0;
+    }
+  }
 }
 
 // Columns