[BUG] Handle unknown types in new-js (#5660)

## Description of changes

We're seeing failures in CI.  Fix this to fix them?

## Test plan

CI

## Migration plan

N/A

## Observability plan

N/A

## Documentation Changes

N/A

Author: rescrv

clients/new-js/packages/chromadb/src/embedding-function.ts

@@ -197,6 +197,10 @@ export const getEmbeddingFunction = async (
     return undefined;
   }
 
+  if (efConfig.type !== "known") {
+    return undefined;
+  }
+
   const name = efConfig.name;
 
   const embeddingFunction = knownEmbeddingFunctions.get(name);
@@ -258,6 +262,10 @@ export const getSparseEmbeddingFunction = async (
     return undefined;
   }
 
+  if (efConfig.type !== "known") {
+    return undefined;
+  }
+
   const name = efConfig.name;
 
   const sparseEmbeddingFunction = knownSparseEmbeddingFunctions.get(name);