feat: some optimization

Signed-off-by: SuZhoue-Joe <suzhou@amazon.com>

src/core/server/saved_objects/import/create_saved_objects.ts

@@ -113,7 +113,7 @@ export const createSavedObjects = async <T>({
   // remap results to reflect the object IDs that were submitted for import
   // this ensures that consumers understand the results
   const remappedResults = expectedResults.map<CreatedObject<T>>((result) => {
-    const { id } = objectIdMap.get(`${result.type}:${result.id}`)!;
+    const { id } = objectIdMap.get(`${result.type}:${result.id}`) || ({} as SavedObject<T>);
     // also, include a `destinationId` field if the object create attempt was made with a different ID
     return { ...result, id, ...(id !== result.id && { destinationId: result.id }) };
   });

src/core/server/saved_objects/service/lib/repository.ts

@@ -405,7 +405,9 @@ export class SavedObjectsRepository {
         method,
       } = expectedBulkGetResult.value;
       let savedObjectWorkspaces: string[] | undefined;
-      if (object.workspaces) {
+      if (expectedBulkGetResult.value.method === 'create') {
+        savedObjectWorkspaces = Array.from(new Set([...(options.workspaces || [])]));
+      } else if (object.workspaces) {
         savedObjectWorkspaces = Array.from(
           new Set([...object.workspaces, ...(options.workspaces || [])])
         );