[Post template] Update how sticky posts are displayed

[carolinan]

Description

Problem 1

If a WordPress install has no sticky posts, standard posts are displayed on the front when the query loop setting "Sticky posts" is set to "only".

The PR adds an early return depending on the setting and if there are sticky posts or not.

How has this been tested?

• Trash or remove sticky from any sticky posts on your WordPress installation
• Add a query loop block to the index in the site editor.
• Set the Sticky post setting to "only".

Sample:

<!-- wp:query {"queryId":1,"query":{"offset":0,"postType":"post","categoryIds":[],"tagIds":[],"order":"desc","orderBy":"date","author":"","search":"","sticky":"only","perPage":3,"inherit":false},"displayLayout":{"type":"list"}} -->
<div class="wp-block-query">
<!-- wp:post-template -->
<!-- wp:post-title {"isLink":true} /-->

<!-- wp:post-excerpt /-->
<!-- /wp:post-template -->

<!-- wp:query-pagination -->
<!-- wp:query-pagination-previous /-->

<!-- wp:query-pagination-numbers /-->

<!-- wp:query-pagination-next /-->
<!-- /wp:query-pagination --></div>
<!-- /wp:query -->

• Confirm that no posts are displaying in the editor. The message "No results found." is shown.
• Save and view the front. Confirm that no posts are showing on the front.

Repeat the test with Inherit query from template enabled.
Now add a sticky post and make sure it still works correctly.

Problem 2

When the query block's Inherit query from template is not enabled, and Sticky posts is set to include,
the sticky posts are:

1. Not displayed in the editor. This is incorrect.
2. Displayed correctly on the homepage
3. Also displayed on top of page 2, and so on in the paged result. This is incorrect.

The PR so far only solves this for the front.

How has this been tested?

1. Make sure your installation has sticky posts
2. Add a query loop block with a query pagination block to the index in the site editor.
3. Save and view the front.
4. Note which posts are showing on the first page, and navigate to page 2 or higher.
5. Confirm that the sticky posts are not showing on page 2 or higher.

Types of changes

Bug fix

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

[carolinan]

need to test if this also needs to include post type 😁

[carolinan]

Its a solution. But I don't like it.