Issue #3426014 by marcoliver, kufliievskyi: Fix phpstan issues

.gitlab-ci.yml

.../permissions_by_entity/permissions_by_entity.services.yml

modules/permissions_by_entity/src/Service/AccessChecker.php

permissions_by_term.module

permissions_by_term.services.yml

phpstan-baseline.neon

phpstan.neon

src/Controller/NodeEntityBundleController.php

src/Controller/PermissionsByTermController.php

src/Factory/NodeAccessRecordFactory.php

src/Form/SettingsForm.php

src/Listener/KernelEventListener.php

src/Service/AccessCheck.php

src/Service/AccessStorage.php

src/Service/NodeAccess.php

tests/phpstan-baseline.neon

...s/src/Behat/Context/PermissionsByTermDrupalSubContext.php

tests/src/Kernel/PBTKernelTestBase.php