Query Title: Add Border Support

[shail-mehta]

What?

Add Border support in the Query Title block.

Part of #43247

Why?

Query Title block is missing border support.

How?

Add the border support in block.json.

Testing Instructions

• Go to Global Styles Settings. ( Under Appearance > Editor > Styles > Edit styles > Blocks )
• Make sure that Query Title block's border is Configurable via Global Styles.
• Edit Archive Template & Add Query Title Block and Apply the border Styles.
• Verify that Query Title block styles take precedence over global Styles.
• Verify that Query Title block borders is showing correctly in both the Editor and Frontend.

Screenshots or Screencast

add-border-support-in-query-title.mp4

[github-actions]

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Co-authored-by: shail-mehta <shailu25@git.wordpress.org>
Co-authored-by: ramonjd <ramonopoly@git.wordpress.org>
Co-authored-by: aaronrobertshaw <aaronrobertshaw@git.wordpress.org>

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[github-actions]

Flaky tests detected in 7526d3c.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/10423152747
📝 Reported issues:

• [Flaky Test] should not render Block Settings sections #64387 in /test/e2e/specs/widgets/customizing-widgets.spec.js

[ramonjd]

I checked the following:

✅ Global styles
✅ Theme.json
✅ Block level

[aaronrobertshaw]

LGTM as well 👍

✅ Global styles apply correctly
✅ Block instance styles override global styles
✅ Styles apply consistently between editor and frontend
✅ Box sizing allows parent to enforce width
✅ Default display of border controls matches spacing controls

Screen.Recording.2024-08-19.at.3.46.03.PM.mp4

[shail-mehta]

Thank you both for reviewing this PR.