Fully replace procedural load operations with storage class operations.

modules/salesforce_mapping/salesforce_mapping.module

modules/salesforce_mapping/salesforce_mapping.services.yml

modules/salesforce_mapping/src/Form/MappedObjectForm.php

modules/salesforce_mapping/src/MappedObjectStorage.php

..._mapping/src/Plugin/SalesforceMappingField/RelatedIDs.php

...lesforce_mapping/src/SalesforceMappingFieldPluginBase.php

modules/salesforce_mapping/src/SalesforceMappingStorage.php

modules/salesforce_mapping/src/ThrowsOnLoadTrait.php

...salesforce_mapping/tests/salesforce_mapping.entities.test

modules/salesforce_pull/salesforce_pull.module

modules/salesforce_pull/src/DeleteHandler.php

modules/salesforce_pull/src/Plugin/QueueWorker/PullBase.php

modules/salesforce_push/salesforce_push.module

modules/salesforce_push/salesforce_push.services.yml

...rce_push/src/Plugin/SalesforcePushQueueProcessor/Rest.php

modules/salesforce_push/src/PushQueue.php

tests/src/salesforce_pull/TestPullBase.php