feat: apply the archive styles to the blog posts page

[laurelfulford]

All Submissions:

• Have you followed the Newspack Contributing guideline?
• Does your code follow the WordPress' coding standards and VIP Go coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

This PR applies the archive settings to the blog posts page, both when it's the landing page of a site, and when it's a subpage.

See NPPM-2447

How to test the changes in this Pull Request:

1. Go to Customizer > Homepage Settings, and make sure you have a page set as your Posts page.
2. Apply this PR.
3. Open the Blog Posts page and a regular archive page in two separate tabs. In a third tab, navigate to Customizer > Template Settings > Archive Settings, and try and save these different settings. Make sure both pages match:
   • Start with the default settings: enable "Crop images...", "Use a large, featured display for the latest post...", "With Sidebar" layout, and "List" - make sure both pages match.
   • Turn off "Use a large, featured display for the latest post...", and turn on "Show excerpts for all archives"
   • Try switching the Archive Layout (One Column, One Column Wide).
   • Try switching between List and Grid Layout.
   • Try a few other random combos.
4. Under Customizer > Homepage Settings, and switch "Your homepage displays" to show "Your latest posts"
5. View the fronr page and confirm it's showing your latest posts with whatever the last settings you had set for the archive page; it should look the same as it did as a page, except it shouldn't show the page title.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

[leogermani]

just works

[laurelfulford]

Thanks @leogermani!

[github-actions]

Hey @laurelfulford, good job getting this PR merged! 🎉

Now, the needs-changelog label has been added to it.

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Thank you! ❤️

[matticbot]

🎉 This PR is included in version 2.17.0-alpha.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[matticbot]

🎉 This PR is included in version 2.17.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀