[TASK] Clean up usages of typo3conf/ext/styleguide

Some left over usages pointing to
typo3conf/ext/styleguide.

Resolves: #102235
Releases: main
Change-Id: Ib7e1050bc63fdafa15bb344a145735644c4985c4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81649


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benjamin Franzke <ben@bnf.dev>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>