[TASK] Deal with sebastian/comparator:5.0.2

sebastian/comparator:5.0.2 got a minor bugfix release
changing a detail of assertEqualsCanonicalizing().
Two tests fail when this transitive dependency
is raised. We slightly refactor the tests to deal
with this.

> composer u sebastian/comparator

Resolves: #104605
Releases: main, 12.4
Change-Id: I1c7b88d438a9f0a2b596e13e960eed78f484d8bf
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/85601


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>