Add automated test for "Name strategies automatic character replacement"

The manual test is here: Name strategies automatic character replacement.

Matrix discussion: https://matrix.to/#/!ikPtGZaGWtyblizzlR:matrix.xwiki.com/$1669733397594cdvZX:matrix.xwiki.com?via=matrix.org&via=matrix.xwiki.com&via=caubin.fr

Ilie Andriuta: Hi! Continuing the manual tests migration, there are some tests about checking if Name Strategies automatic character replacement works properly: https://test.xwiki.org/xwiki/bin/view/Administration%20Tests/Name%20strategies%20automatic%20character%20replacement and https://test.xwiki.org/xwiki/bin/view/Administration%20Tests/Name%20strategies%20character%20replacement%20validation. I've checked https://github.com/xwiki/xwiki-platform/blob/cc86017d0a59e37756c78057254623292a155655/xwiki-platform-core/xwiki-platform-name-strategies/xwiki-platform-name-strategies-default/src/test/java/org/xwiki/namestrategies/internal/ReplaceCharacterNameStrategyTest.java and the automated tests seem to exist. Can you please confirm?

Thanks!

Vincent Massol: it's almost covered but not fully
for example there's no testing that the UI interface works
the test you linked is a unit test showing that the transformation works when executed
the existing test also doesn't verify that "/" is set by default (which your manual test does)
so I'd still create the jira to add the missing parts