Breadcrumbs Block: Use HtmlRenderer to remove extra div from editor

[hbhalodia]

What?

Part of: #74248

Why?

1. Remove extra wrapper div from the block in backend.

How?

1. Uses the HTMLRenderer component and useServerSideRender() hook to eliminate these extra divs and make the HTML on the front end and editor match for Breadcrumbs Block.

Testing Instructions

1. Open post or page.
2. Add core/breadcrumbs block.
3. Inspect the block, you will notice no extra div present.

Testing Instructions for Keyboard

• NA

Screenshots or screencast

Before (Editor)	After (Editor)

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: hbhalodia <[email protected]>
Co-authored-by: t-hamano <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[t-hamano]

Thanks for the PR!

The style attributes added on the server side are not visible in the editor, so we need to fix that:

This should be resolved by modifying the useBlockProps hook as follows:

const blockProps = useBlockProps( {
	ref: disabledRef,
	style: { '--separator': `'${ separator }'` },
} );

[t-hamano]

LGTM!

[t-hamano]

Sorry, I just discovered an issue with the sidebar flickering, so I've submitted #74291 to fix it. If that approach makes sense, let's apply it to this PR as well.

[hbhalodia]

Sorry, I just discovered an issue with the sidebar flickering, so I've submitted #74291 to fix it. If that approach makes sense, let's apply it to this PR as well.

I am sorry 😅, I had discovered that earlier while fixing the comments, but I thought it too not a bug related to the fix. Fixing the same in all the PRs and current one as well.

[hbhalodia]

@t-hamano This is now updated, Needs review on the same.

Thank You,