distutils: expose Command.dry_run + make 0|1 attrs bool (#12607)

stdlib/distutils/dist.pyi

@@ -88,9 +88,9 @@ class Distribution:
     display_options: ClassVar[_OptionsList]
     display_option_names: ClassVar[list[str]]
     negative_opt: ClassVar[dict[str, str]]
-    verbose: int
-    dry_run: int
-    help: int
+    verbose: Literal[0, 1]
+    dry_run: Literal[0, 1]
+    help: Literal[0, 1]
     command_packages: list[str] | None
     script_name: str | None
     script_args: list[str] | None