fix(textarea): add aria-labelledby to native textarea (#21606)

resolves #21600

core/src/components/textarea/textarea.tsx

@@ -333,6 +333,7 @@ export class Textarea implements ComponentInterface {
         >
           <textarea
             class="native-textarea"
+            aria-labelledby={labelId}
             ref={el => this.nativeInput = el}
             autoCapitalize={this.autocapitalize}
             autoFocus={this.autofocus}