tensorflow: add tf.distribute.experimental.coordinator.RemoteValue (#11349)

Author: hoel-bagard

stubs/tensorflow/@tests/stubtest_allowlist.txt

@@ -47,6 +47,8 @@ tensorflow._aliases
 # but the real module file is completely different name (even package) and dynamically handled.
 # tf.initializers at runtime is <module 'keras.api._v2.keras.initializers' from '...'>
 tensorflow.initializers
+# Another cursed import magic similar to the one above.
+tensorflow.distribute.experimental.coordinator
 
 # Layer constructor's always have **kwargs, but only allow a few specific values. PEP 692
 # would allow us to specify this with **kwargs and remove the need for these exceptions.

stubs/tensorflow/tensorflow/distribute/experimental/coordinator.pyi

@@ -0,0 +1,12 @@
+from _typeshed import Incomplete
+from typing import Generic, TypeVar
+
+from tensorflow._aliases import AnyArray
+
+_Value = TypeVar("_Value", covariant=True)
+
+class RemoteValue(Generic[_Value]):
+    def fetch(self) -> AnyArray: ...
+    def get(self) -> _Value: ...
+
+def __getattr__(name: str) -> Incomplete: ...