fix(Textarea): resolve row count calculation errors caused by scrollbar (#2040)

Co-authored-by: Romain Hamel <rom.hml@gmail.com>

Author: Mini-ghost

src/runtime/components/forms/Textarea.vue

@@ -154,6 +154,8 @@ export default defineComponent({
         }
 
         textarea.value.rows = props.rows
+        const overflow = textarea.value.style.overflow
+        textarea.value.style.overflow = 'hidden'
 
         const styles = window.getComputedStyle(textarea.value)
         const paddingTop = parseInt(styles.paddingTop)
@@ -166,6 +168,8 @@ export default defineComponent({
         if (newRows > props.rows) {
           textarea.value.rows = props.maxrows ? Math.min(newRows, props.maxrows) : newRows
         }
+
+        textarea.value.style.overflow = overflow
       }
     }