[BUGFIX] Prevent resolving translated page with default slug

Default language page slug usage in combination with
the siteLanguage base of non-default language has been
resolved and delivering the language content. This made
the page accessible with multiple urls.

Available and existing translated pages should be only
resolved by the language slug, not the default language
page slug. However, if page is not translated, using the
default language slug for the resolving should be only
considered and working if fallback settings are provided.

Resolves: #88715
Resolves: #96010
Releases: main, 11.5
Change-Id: Id618880fe2ba26fd3b6ab50b4813968923ec5acb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75101


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>