Fixed UrlAlias class name case in URLAliasService and clean phpstan baseline

[mikadamczyk]

🎫 Issue	N/A

Description:

Fixes https://github.com/ibexa/core/actions/runs/22387391260/job/64800904997?pr=714

Error: Ignored error pattern #^Class Ibexa\\Contracts\\Core\\Persistence\\Content\\UrlAlias referenced with incorrect case\: Ibexa\\Contracts\\Core\\Persistence\\Content\\URLAlias\.$# (class.nameCase) in path /home/runner/work/core/core/src/lib/Repository/URLAliasService.php is expected to occur 7 times, but occurred only 2 times.
 ------ ----------------------------------------------------------------------- 
  Line   src/lib/Repository/URLAliasService.php                                 
 ------ ----------------------------------------------------------------------- 
  12     Ignored error pattern #^Class                                          
         Ibexa\\Contracts\\Core\\Persistence\\Content\\UrlAlias referenced      
         with incorrect case\:                                                  
         Ibexa\\Contracts\\Core\\Persistence\\Content\\URLAlias\.$#             
         (class.nameCase) in path                                               
         /home/runner/work/core/core/src/lib/Repository/URLAliasService.php is  
         expected to occur 7 times, but occurred only 2 times.                  
 ------ ----------------------------------------------------------------------- 

For QA:

Documentation:

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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