Add method to update lists from JSON files and clear cache

[Miraeld]

• DynamicLists.php

  • Add update_lists_from_files method to clear transient cache and update lists from JSON files
  • Call remove_lists_cache and get_lists methods from each provider's data manager in update_lists_from_files

• AbstractDataManager.php

  • Add remove_lists_cache method to delete transient cache

• Subscriber.php

  • Modify wp_rocket_upgrade callback to call update_lists_from_files method
  • Add update_lists_from_files method to call $this->dynamic_lists->update_lists_from_files()

Description

Fixes #6920
This update modifies the dynamic lists handling, improving the performance and reliability of the feature as the customer won't have to wait a week before getting the new exclusions updated.

Type of change

• Bug fix (non-breaking change which fixes an issue).

Detailed scenario

Update WP Rocket

Technical description

Documentation

We simply delete the transient cache before fetching the dynamic list from the file within the ZIP archive.

New dependencies

Risks

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.