fix(medusa,utils): Searching indexing product subscriber (#3905)

packages/utils/src/search/index.ts

@@ -1,3 +1,4 @@
 export * from "./abstract-service"
 export * from "./is-search-service"
+export * from "./search-relations"
 

packages/utils/src/search/search-relations.ts

@@ -0,0 +1,10 @@
+export const defaultSearchIndexingProductRelations = [
+  "variants",
+  "tags",
+  "type",
+  "collection",
+  "variants.prices",
+  "images",
+  "variants.options",
+  "options",
+]