Closes #4320 combine CSS divi 4.10 compatibility

[mostafa-hisham]

Description

exclude all Divi CSS files which are stored in /wp-content/et-cache/ From being Combined

Fixes #4320

Type of change

• Enhancement (non-breaking change which improves an existing functionality)

Is the solution different from the one proposed during the grooming?

No

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Tested locally

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Mai-Saad]

Well, I can't see a UI problem when the Combine CSS is enabled while Load Dynamic Stylesheet Inline is enabled at Divi, however, while checking that we keep Divi CSS order, here is the current state/questions:

1- When Load Dynamic Stylesheet is enabled => All Divi related style sheets under the inline CSS are kept in the source (Is it expected that the sheet here is normally combined
<meta content="Divi v.4.10.7" name="generator"/><link rel='stylesheet' id='wp-block-library-css' href='https://new.rocketlabsqa.ovh/wp-includes/css/dist/block-library/style.min.css?ver=5.8.1' type='text/css' media='all' /> also it was below an inline style <style id="et-divi-open-sans-inline-css">?) => we agreed that this is fine

2- When Critical CSS is enabled while Load Dynamic Stylesheet is disabled => This file is combined <link rel='stylesheet' id='divi-style-css' href='https://new.rocketlabsqa.ovh/wp-content/themes/Divi/style.min.css?ver=4.10.7' type='text/css' media='all' /> also it was below an inline style <style id="et-divi-open-sans-inline-css"> (order changed here, so shouldn't we keep this file uncombined?) => we agreed that this is fine (combine styles that was under fonts inline)

[Tabrisrp]

Test & fixture should be updated based on the review's comments.

[Tabrisrp]

need to update the fixtures and test too

[Mai-Saad]

Working as expected
testrail-report-265.pdf

Notes:
We agreed that the following is fine
1- While Critical CSS is enabled at Divi , we will combine Divi style file although it's under divi inline fonts
2- If both Load CSS and critical CSS are disabled at Divi, there will be no inline for Divi styles and we will still exclude Divi files from Combine CSS