create list_dataset api and tests (#1138)

### What problem does this PR solve?

This PR have completed both HTTP API and Python SDK for 'list_dataset".
In addition, there are tests for it.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

api/db/services/knowledgebase_service.py

@@ -40,6 +40,29 @@ class KnowledgebaseService(CommonService):
 
         return list(kbs.dicts())
 
+    @classmethod
+    @DB.connection_context()
+    def get_by_tenant_ids(cls, joined_tenant_ids, user_id,
+                          offset, count, orderby, desc):
+        kbs = cls.model.select().where(
+            ((cls.model.tenant_id.in_(joined_tenant_ids) & (cls.model.permission ==
+                                                            TenantPermission.TEAM.value)) | (
+                     cls.model.tenant_id == user_id))
+            & (cls.model.status == StatusEnum.VALID.value)
+        )
+        if desc:
+            kbs = kbs.order_by(cls.model.getter_by(orderby).desc())
+        else:
+            kbs = kbs.order_by(cls.model.getter_by(orderby).asc())
+
+        kbs = list(kbs.dicts())
+
+        kbs_length = len(kbs)
+        if offset < 0 or offset > kbs_length:
+            raise IndexError("Offset is out of the valid range.")
+
+        return kbs[offset:offset+count]
+
     @classmethod
     @DB.connection_context()
     def get_detail(cls, kb_id):