moved indexer spi's back to indexer-core

...pengroup/osdu/indexer/provider/interfaces/IPublisher.java

...ngroup/osdu/indexer/provider/interfaces/ISchemaCache.java

...pengroup/osdu/indexer/service/IndexSchemaServiceImpl.java

...rg/opengroup/osdu/indexer/service/IndexerServiceImpl.java

...org/opengroup/osdu/indexer/aws/cache/SchemaCacheImpl.java

...org/opengroup/osdu/indexer/aws/publish/PublisherImpl.java

...a/org/opengroup/osdu/indexer/azure/cache/SchemaCache.java

...g/opengroup/osdu/indexer/azure/publish/PublisherImpl.java

.../osdu/indexer/azure/service/IndexerSchemaServiceTest.java

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

...ava/org/opengroup/osdu/indexer/publish/PublisherImpl.java

...ngroup/osdu/indexer/service/IndexerSchemaServiceTest.java