[web] Prevent line-breaks within prices (#17574)

* Set coupon-name column width to 70%

* Add `white-space: nowrap` to prices in price-summary.tsx

GitOrigin-RevId: 4b2297810c94c79b08be3fb0c560e280a451c468

services/web/frontend/stylesheets/app/subscription.less

@@ -143,6 +143,10 @@
   }
 }
 
+.price-nowrap {
+  white-space: nowrap;
+}
+
 .price-details-spacing {
   height: @line-height-computed / 2;
 }