Remove ContainerAwareTrait from session middleware

Problem/Motivation

In #3392616-5: Update to Symfony 6.4 we've found out that the Symfony\Component\DependencyInjection\ContainerAwareTrait and Symfony\Component\DependencyInjection\ContainerAwareInterface are being deprecated in Symfony 6.4 and removed in 7.0.

Drupal\Core\StackMiddleware\Session is container aware because of the following comment:

 * Note, the session service is not injected into this class in order to prevent
 * premature initialization of session storage (database). Instead the session
 * service is retrieved from the container only when handling the request.

SessionManager injects the database service but only uses it in the delete() method.

Steps to reproduce

Proposed resolution

Inject the database service into SessionManager using a service closure

Inject the session service as normal into the Session middleware.

Merge request link

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet