fix: poll builders (#10783)

* fix: poll builders

- Fixed validations
- Added missing documentation
- Removed redundant code
- Consistency™️

* fix: tests

* feat: missing answers test

packages/builders/src/messages/poll/PollQuestion.ts

@@ -7,11 +7,14 @@ import { PollMediaBuilder } from './PollMedia.js';
  * A builder that creates API-compatible JSON data for a poll question.
  */
 export class PollQuestionBuilder extends PollMediaBuilder {
+	/**
+	 * {@inheritDoc PollMediaBuilder.toJSON}
+	 */
 	public override toJSON(validationOverride?: boolean): Omit<APIPollMedia, 'emoji'> {
 		const clone = structuredClone(this.data);
 
 		validate(pollQuestionPredicate, clone, validationOverride);
 
-		return clone as Omit<APIPollMedia, 'emoji'>;
+		return clone;
 	}
 }