fix(components): [el-input] center in vertical direction (element-plus#9732)

Author: btea

packages/theme-chalk/src/input.scss

@@ -136,6 +136,7 @@
   width: 100%;
   line-height: getCssVar('input-height');
   box-sizing: border-box;
+  vertical-align: middle;
   @include scroll-bar;
 
   & .#{$namespace}-input__clear,