Allow to change `.table-striped` `odd` or `even` (#25333)

scss/_tables.scss

@@ -68,7 +68,7 @@
 // Default zebra-stripe styles (alternating gray and transparent backgrounds)
 
 .table-striped {
-  tbody tr:nth-of-type(odd) {
+  tbody tr:nth-of-type(#{$table-striped-order}) {
     background-color: $table-accent-bg;
   }
 }

scss/_variables.scss

@@ -317,6 +317,8 @@ $table-dark-hover-bg:         rgba($white, .075) !default;
 $table-dark-border-color:     lighten($gray-900, 7.5%) !default;
 $table-dark-color:            $body-bg !default;
 
+$table-striped-order:         odd !default;
+
 
 // Buttons + Forms
 //