The xsl file to create a layout for a XML sitemap can now be configured
on three levels:

1. for all sitemaps
2. for all sitemaps of a certain sitemapType
3. for a specific sitemap

The value is inherited until it is overwritten.
If no value is specified at all, EXT:seo/Resources/Public/CSS/Sitemap.xsl
is used as default like before.

Resolves: #88147
Releases: master
Change-Id: I1c5212a1c9fe4226100de8f4bd0f84d70b89fcf5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62121


Tested-by: Richard Haeser <richard@maxserv.com>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Richard Haeser <richard@maxserv.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>