Add missing __slots__ to third-party packages (#15454)

stubs/google-cloud-ndb/google/cloud/ndb/_options.pyi

@@ -1,6 +1,20 @@
 from _typeshed import Incomplete
 
 class Options:
+    __slots__ = (
+        "retries",
+        "timeout",
+        "use_cache",
+        "use_global_cache",
+        "global_cache_timeout",
+        "use_datastore",
+        "force_writes",
+        "max_memcache_items",
+        "propagation",
+        "deadline",
+        "use_memcache",
+        "memcache_timeout",
+    )
     @classmethod
     def options(cls, wrapped, _disambiguate_from_model_properties: bool = ...): ...
     @classmethod
@@ -12,4 +26,5 @@ class Options:
     def items(self) -> None: ...
 
 class ReadOptions(Options):
+    __slots__ = ("read_consistency", "read_policy", "transaction")
     def __init__(self, config: Incomplete | None = ..., **kwargs) -> None: ...

stubs/google-cloud-ndb/google/cloud/ndb/model.pyi

@@ -137,6 +137,7 @@ class BlobProperty(Property):
     def __get__(self, entity: Model, unused_cls: type[Model] | None = ...) -> bytes | list[bytes] | None: ...
 
 class CompressedTextProperty(BlobProperty):
+    __slots__ = ()
     def __init__(self, *args, **kwargs) -> None: ...
 
 class TextProperty(Property):

stubs/google-cloud-ndb/google/cloud/ndb/query.pyi

@@ -88,6 +88,25 @@ AND = ConjunctionNode
 OR = DisjunctionNode
 
 class QueryOptions(_options.ReadOptions):
+    __slots__ = (
+        "kind",
+        "ancestor",
+        "filters",
+        "order_by",
+        "orders",
+        "distinct_on",
+        "group_by",
+        "namespace",
+        "project",
+        "database",
+        "keys_only",
+        "limit",
+        "offset",
+        "start_cursor",
+        "end_cursor",
+        "projection",
+        "callback",
+    )
     project: Incomplete
     namespace: Incomplete
     database: str | None