[Tests] Refactored various unit tests to make them DRY

[alongosz]

🎫 Issue	Related to IBX-8138

TODO

• Seems there's more code duplication detected.

Related PRs:

• IBX-8138: [Rector] Applied rules from Symfony 5 Rector set lists #385

Description:

This PR addresses a several of the many code redundancy issues found by SonarCloud while working on #385.

Refactored few unit test clases, including Base Repository service mock tests to avoid code redundancy.

Changelog:

• [Tests] Fixed code duplication in Content & Location handler tests
• [Tests] Refactored redundant code in RejectExplicitFrontControllerRequestsListenerTest
• [Tests] Improved quality of Base Repository service mock tests
• [Tests] Refactored ContentTest to drop redundancy
• [Tests] Refactored PermissionsCriterionHandlerTest to rely on base permission resolver
• [Tests] Aligned RelationProcessorTest with Base changes
• [Tests] Aligned RoleTest with Base changes
• [Tests] Aligned PermissionTest with Base changes
• [PHPStan] Aligned baseline with the changes

For QA

No QA required, unit test changes only.

[sonarqubecloud]

Quality Gate failed

Failed conditions
16.2% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[sonarqubecloud]

Quality Gate failed

Failed conditions
16.2% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[adamwojs]

@alongosz rebase is needed here