PHPStan is not passing on develop

[Miraeld]

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Describe the bug

PHPStan isn't passing anymore.

 ------ ----------------------------------------------------------------------------------------------------------------------------- 
  Line   inc/Engine/Optimization/LazyRenderContent/Frontend/Processor/Regex.php                                                       
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  37     Property WP_Rocket\Engine\Optimization\LazyRenderContent\Frontend\Processor\Regex::$exclusions is never read, only written.  
         💡 See: https://phpstan.org/developing-extensions/always-read-written-properties                                             
 ------ ----------------------------------------------------------------------------------------------------------------------------- 

 ------ ------------------------------------------------------------------------------------------------------------------------------------- 
  Line   inc/Engine/Optimization/LazyRenderContent/Frontend/Processor/SimpleHtmlDom.php                                                       
 ------ ------------------------------------------------------------------------------------------------------------------------------------- 
  40     Property WP_Rocket\Engine\Optimization\LazyRenderContent\Frontend\Processor\SimpleHtmlDom::$exclusions is never read, only written.  
         💡 See: https://phpstan.org/developing-extensions/always-read-written-properties                                                     
 ------ ------------------------------------------------------------------------------------------------------------------------------------- 

To Reproduce
No way to reproduce, except running composer run-stan.

Expected behavior
No errors should happen with phpstan

Solution

We should add a /* @phpstan-ignore-line */ to both errors as the reason is only because we are using the DOM to process LRC and at the moment we are keeping other solutions in case.
As this 2 others solutions aren't used, it detects these properties as not used.

[Miraeld]

It will be fixed with #6996