[!!!][TASK] Remove deprecated ResourceUtility

The core utility class ResourceUtility is a leftover from
an old FAL implementation. In a refactoring in TYPO3 v7 this
class was replaced with a direct implementation and has not
been used in the core ever since.

Resolves: #101024
Related: #97576
Related: #100963
Releases: main
Change-Id: Ic2a3d74caca888e0ff50fe4f3b243f0a9b5e4cf3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79308


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Thomas Hohn <tho@gyldendal.dk>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>