[Composer] Limited doctrine/collections to ^1.8

[mnocon]

Right now our tests on 4.3 are failing with:

Executing script cache:clear [KO]
 [KO]
Script cache:clear returned with error code 255
!!  
!!   // Clearing the cache for the behat environment with debug                     
!!   // true                                                                        
!!  
!!  PHP Fatal error:  Class JMS\JobQueueBundle\Entity\Listener\PersistentRelatedEntitiesCollection 
contains 2 abstract methods and must therefore be declared abstract 
or implement the remaining methods 
(Doctrine\Common\Collections\ReadableCollection::findFirst, 
Doctrine\Common\Collections\ReadableCollection::reduce) in 
/var/www/vendor/ezsystems/job-queue-bundle/JMS/JobQueueBundle/Entity/
Listener/PersistentRelatedEntitiesCollection.php on line 22

Link: https://github.com/ibexa/commerce/actions/runs/4308277557/jobs/7514641798

This is caused by our latest changes to website-skeleton (we don't install doctrine/collections during that phase anymore), which means that doctrine/collections v2 was available for installation.

This package uses the collection dependency (though it was not present in composer.json) and is not compatible with v2.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication