chore: add IN/NOT_IN/NOT_EQUALS support to cloud datastore proto (#284)

* feat: add IN/NOT_IN/NOT_EQUALS support to cloud datastore proto

PiperOrigin-RevId: 434824722

Source-Link: googleapis/googleapis@4bfdcd3

Source-Link: googleapis/googleapis-gen@5982b9b
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google/cloud/datastore_v1/types/entity.py

@@ -189,7 +189,7 @@ class Value(proto.Message):
             This field is a member of `oneof`_ ``value_type``.
         string_value (str):
             A UTF-8 encoded string value. When ``exclude_from_indexes``
-            is false (it is indexed), may have at most 1500 bytes.
+            is false (it is indexed) , may have at most 1500 bytes.
             Otherwise, may be set to at most 1,000,000 bytes.
 
             This field is a member of `oneof`_ ``value_type``.

google/cloud/datastore_v1/types/query.py

@@ -260,7 +260,10 @@ class Operator(proto.Enum):
         GREATER_THAN = 3
         GREATER_THAN_OR_EQUAL = 4
         EQUAL = 5
+        IN = 6
+        NOT_EQUAL = 9
         HAS_ANCESTOR = 11
+        NOT_IN = 13
 
     property = proto.Field(proto.MESSAGE, number=1, message="PropertyReference",)
     op = proto.Field(proto.ENUM, number=2, enum=Operator,)