Closes #7246 3.19 - Preconnect to external domains - Beacon insertion part

[Khadreal]

Description

Fixes #7246

Type of change

• New feature (non-breaking change which adds functionality).

Detailed scenario

N/A

Technical description

Documentation

Add factory class for Preload fonts to service provider

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.
• Output messages (errors, notices, logs) are explicit enough for users to understand the issue and are actionnable.

[Khadreal]

Test is failing which would be resolve when this issue is completed.