Include border-spacing gutters in compute_inline_content_sizes (#31337)

This way, if the table is inside an intrinsically sized container, like
a float or inline-block, the table won't overflow it (in basic cases).

components/layout_2020/table/layout.rs

@@ -1185,6 +1185,9 @@ impl Table {
             inline_content_sizes.push(row_inline_content_sizes);
             total_size += max_content_sizes_in_column;
         }
+        let gutters = self.border_spacing().inline * (self.size.width as i32 + 1);
+        total_size.min_content += gutters;
+        total_size.max_content += gutters;
         (total_size, inline_content_sizes)
     }