fix(textfield): no longer inherits text-align from parents

Fixes #5509

PiperOrigin-RevId: 614835633

textfield/internal/_shared.scss

@@ -16,6 +16,8 @@
     display: inline-flex;
     outline: none;
     resize: both;
+    // Match default text-align of `<input>` instead of `inherit`.
+    text-align: start;
     -webkit-tap-highlight-color: transparent;
   }