feat: supress carousel block from feeds NPPM-2413

[leogermani]

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Changes proposed in this Pull Request:

Adds the same behavior of the Content Loop block and exclude it from feeds

How to test the changes in this Pull Request:

1. Add a carousel block to a post
2. Make sure it works as expected both in the editor and in the frontend
3. Confirm it's no longer included in feeds

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

[rbcorrales]

I was doing this for Pugpig feeds only:

	/**
	 * Prevent carousel blocks from rendering in the Pugpig feed.
	 *
	 * @param string|null $pre_render The pre-rendered content. Default null.
	 * @param array       $parsed_block An associative array of the block being rendered.
	 * @return string|null The pre-rendered content.
	 */
	public static function prevent_carousel_rendering( $pre_render, $parsed_block ) {
		if ( Utils::is_pugpig_feed() && 'newspack-blocks/carousel' === ( $parsed_block['blockName'] ?? '' ) ) {
			return '';
		}

		return $pre_render;
	}

But if we don't want to see it anywhere, this is better.

[github-actions]

Hey @leogermani, good job getting this PR merged! 🎉

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