Revert "Remove useless NoReturn in NodeNG.statement's typing (pylint-…

…dev#1304)" (pylint-dev#1307)

This reverts commit df854be.

astroid/nodes/node_ng.py

@@ -32,6 +32,11 @@
 if TYPE_CHECKING:
     from astroid import nodes
 
+    if sys.version_info >= (3, 6, 2):
+        from typing import NoReturn
+    else:
+        from typing_extensions import NoReturn
+
 if sys.version_info >= (3, 8):
     from typing import Literal
 else:
@@ -282,7 +287,7 @@ def statement(self, *, future: Literal[True]) -> "nodes.Statement":
 
     def statement(
         self, *, future: Literal[None, True] = None
-    ) -> Union["nodes.Statement", "nodes.Module"]:
+    ) -> Union["nodes.Statement", "nodes.Module", "NoReturn"]:
         """The first parent node, including self, marked as statement node.
 
         TODO: Deprecate the future parameter and only raise StatementMissing and return