3.18 - Handling preconnect with exclusions

[piotrbak]

User Story
As a user, I’d like preconnect and prefetch links not to be removed when Google Font file is excluded from being downloaded

Acceptance Criteria

• When the Google Fonts (it's important that it's about Google Fonts, as in the future we might have other fonts hosted locally) are excluded from being downloaded, Google preconnect and prefetch links should not be removed
• When other fonts are excluded (theoretically), Google preconnect and prefetch links should not removed
• Removing Google preconnect and prefetch links should work without regression when there's no exclusion at all

[jeawhanlee]

Scope a solution ✅

We will do a check with the proposed filter here on this line which is from this PR
This will only remove the preconnect if there are no google fonts in the exclusion.

Estimate the effort ✅

[XS]

My only concern is that the filter is regex compatible and will accept either full url or a part for the exclusion which might not be sufficient enough to detect if a font is from google or not.

@wp-media/product What if we have 2 exclusion filters for both google and other fonts?

[piotrbak]

@jeawhanlee In this PR we'll be checking if the regex pattern matches the HTML. Can't we also check if it matches Google URL?