BUG: Infinite loop when using excerpt highlighting with posts that use blocks that print an excerpt

[JakePT]

Describe the bug

When we add highlighting to an excerpt, we do so with the get_the_excerpt filter, and in our callback we get the full post content and apply the the_content filter to it.

ElasticPress/includes/classes/Feature/Search/Search.php

Lines 291 to 292 in 0217bee

	$text = get_the_content( '', false, $post );
	$text = apply_filters( 'the_content', $text );

The problem is that if the post contains a Query Loop block with a Post Excerpt block, or any other block that uses the_excerpt(), an infinite loop will occur.

As per a comment, our callback "reproduces wp_trim_excerpt filter", but it appears to be out of date. The latest version of wp_trim_excerpt() in core appears to use excerpt_remove_blocks(), which excludes the query loop blocks from the excerpt, which would avoid the issue. We will need to do something similar.

Steps to Reproduce

1. Enable Excerpt highlighting.
2. Create a Post with a Query Loop block and a Post Excerpt block inside the Post Template block.
3. Search for that post. A timeout or memory limit error should occur.

Screenshots, screen recording, code snippet

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Environment information

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WordPress and ElasticPress information

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