fixup! Host.os_type(): Return "darwin" on macOS

Author: zmc

ceph_devstack/host.py

@@ -82,7 +82,8 @@ def os_type(self) -> str:
                 assert proc.stdout is not None
                 assert proc.wait() == 0, "is /etc/os-release missing?"
                 self._os_type = proc.stdout.read().decode().strip().lower()
-            self._os_type = uname_str
+            else:
+                self._os_type = uname_str
         return self._os_type
 
     def package_manager(self) -> str | None: