Fix callouts with headers in tab groups not rendering

[maximusmith529]

Proposed changes

Callouts with headers (important, caution, warning, and deprecated) and no custom title were incorrectly rendering inside of tab groups. This fix prevents that by checking if there is a title, if not it uses the typing of the call-out.

In addition I've removed the deprecated examples within the site, so only up-to-date examples are on it.

I've included the before and after for callouts within tab groups and outside of. There has been noticeable change to regular, non-tabbed, loud callouts.

Before	After

This is in response to this issue: nginx/documentation#1163

Thanks @JTorreG for the clarification on the issue and your workaround!

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have updated any relevant documentation (README.md and CHANGELOG.md)

[lamATnginx]

Can you clean up the exampleSite based on the pipleine? We don't want to encourage these shortcodes from being used.

[maximusmith529]

I'll check it out 🫡

[github-actions]

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[lamATnginx]

Remove the old "plain" shortcodes. Not needed.

[lamATnginx]

Remove old "plain" callouts usages in other files such as test-product/everything.md.

Do not outright remove everything. We still want to preserve the original intent of whatever was using the old "plain" shortcodes, so in some cases, a rewrite is needed. For example, in test-product/call-out/call-out-code-lists.md, we need to rewrite the two note shortcodes.

[lamATnginx]

Remove old shortcodes.

Besides that, LGTM.