remove core-plus gc provider namespace and file structure

...rg/opengroup/osdu/indexer/IndexerCorePlusApplication.java

.../opengroup/osdu/indexer/common/cache/AttributesCache.java

.../org/opengroup/osdu/indexer/common/cache/CacheConfig.java

...up/osdu/indexer/common/cache/ElasticCredentialsCache.java

...a/org/opengroup/osdu/indexer/common/cache/IndexCache.java

.../org/opengroup/osdu/indexer/common/cache/SchemaCache.java

...du/indexer/common/di/CorePlusConfigurationProperties.java

...opengroup/osdu/indexer/common/di/ElasticSearchConfig.java

...oup/osdu/indexer/common/di/EntitlementsClientFactory.java

.../java/org/opengroup/osdu/indexer/common/package-info.java

.../osdu/indexer/common/publish/JobStatusJsonSerializer.java

...sdu/indexer/common/publish/ReprocessingTaskPublisher.java

...roup/osdu/indexer/common/publish/StatusPublisherImpl.java

...u/indexer/common/util/ServiceAccountJwtGcpClientImpl.java

...u/indexer/indexing/config/CustomContextConfiguration.java

...du/indexer/indexing/config/MessagingConfigProperties.java

...u/indexer/indexing/config/ScopeModifierPostProcessor.java

...indexer/indexing/initialization/OqmSubscriberManager.java

...ndexing/initialization/TenantSubscriberConfiguration.java

...ava/org/opengroup/osdu/indexer/indexing/package-info.java