fix: vector store type (#1334)

examples/vectorIndexFromVectorStore.ts

packages/llamaindex/src/indices/vectorStore/index.ts

packages/llamaindex/src/ingestion/IngestionPipeline.ts

...ndex/src/ingestion/strategies/UpsertsAndDeleteStrategy.ts

...es/llamaindex/src/ingestion/strategies/UpsertsStrategy.ts

packages/llamaindex/src/ingestion/strategies/index.ts

packages/llamaindex/src/storage/StorageContext.ts

packages/llamaindex/src/vector-store/AstraDBVectorStore.ts

packages/llamaindex/src/vector-store/ChromaVectorStore.ts

packages/llamaindex/src/vector-store/MilvusVectorStore.ts

...es/llamaindex/src/vector-store/MongoDBAtlasVectorStore.ts

packages/llamaindex/src/vector-store/PGVectorStore.ts

packages/llamaindex/src/vector-store/PineconeVectorStore.ts

packages/llamaindex/src/vector-store/QdrantVectorStore.ts

packages/llamaindex/src/vector-store/SimpleVectorStore.ts

packages/llamaindex/src/vector-store/UpstashVectorStore.ts

packages/llamaindex/src/vector-store/WeaviateVectorStore.ts

packages/llamaindex/src/vector-store/types.ts

.../llamaindex/tests/vector-stores/SimpleVectorStore.test.ts