Revert "Avoid reading the session multiple times from the database in a single request."

This reverts commit 7192e60a.

Closes #3414373

added 17 commits

• fc935ecf...62498926 - 12 commits from branch project:11.x
• 066fc37f - Avoid reading the session multiple times from the database in a single request.
• 2369ac12 - Revert "Avoid reading the session multiple times from the database in a single request."
• 40c65e78 - Adjust assertions.
• a9837a9e - Revert debug cruft from RouteProvider.
• 4ac5f283 - Add an explicit priority to the route preloader and adjust test coverage.

Compare with previous version

added 198 commits

• 4ac5f283...865b8f43 - 193 commits from branch project:11.x
• c75720a3 - Avoid reading the session multiple times from the database in a single request.
• 5153c3a1 - Revert "Avoid reading the session multiple times from the database in a single request."
• 962f0801 - Adjust assertions.
• 3bb1c34a - Revert debug cruft from RouteProvider.
• ac2640ce - Add an explicit priority to the route preloader and adjust test coverage.

Compare with previous version

added 1 commit

• 2e2a425f - No less cache gets.

Compare with previous version