Deprecated: Creation of dynamic property Optimizely\Utils\CustomAttributeConditionEvaluator::$logger is deprecated

### Description

There are (at least) 2 remaining deprecated definitions of dynamic properties, in `OptimizelyConfigService` and `CustomAttributeConditionEvaluator`.

All properties (at least outside of the tests) should use explicit property definition.

### Benefits

Get rid of deprecation infos in runtime.
