Issue #2632516: Rename RulesState and its interface to ExecutionState.

src/Context/ContextHandlerTrait.php

src/Context/DataProcessorInterface.php

src/Engine/ConditionExpressionContainer.php

src/Engine/ExecutionState.php

src/Engine/ExecutionStateInterface.php

src/Engine/ExpressionBase.php

src/Engine/ExpressionInterface.php

src/Engine/RulesComponent.php

src/EventSubscriber/GenericEventSubscriber.php

src/Plugin/RulesDataProcessor/NumericOffset.php

src/Plugin/RulesDataProcessor/TokenProcessor.php

src/Plugin/RulesExpression/ActionSet.php

src/Plugin/RulesExpression/Rule.php

src/Plugin/RulesExpression/RulesAction.php

src/Plugin/RulesExpression/RulesAnd.php

src/Plugin/RulesExpression/RulesCondition.php

src/Plugin/RulesExpression/RulesOr.php

tests/src/Integration/Engine/RulesComponentTest.php

tests/src/Kernel/RulesEngineTest.php

tests/src/Unit/ActionSetTest.php