[Security] Uniform AccessDecisionManager decide behaviour

| Q                     | A
| --------------------|---
| Bug fix?           | yes
| New feature?   | no
| BC breaks?     | no
| Deprecations? | no
| Tests pass?     | yes
| Fixed tickets    | #10170
| License           | MIT
| Doc PR           | none

This PR uniforms the way the 3 decision policies (affirmative, consensus, unanimous) are handled in the Security\Core\Authoritzation\AccessDecisionManager.php

See #10170