twister: remove lock from generated hardware map

remove lock before storing yaml file.

Fixes #39179

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

scripts/pylib/twister/twisterlib.py

@@ -4273,6 +4273,7 @@ class HardwareMap:
                             s_dev.runner = runner
 
                 s_dev.connected = True
+                s_dev.lock = None
                 self.detected.append(s_dev)
             else:
                 logger.warning("Unsupported device (%s): %s" % (d.manufacturer, d))