Add CL number for Unreal Engine 5.3.0

Author: adamrehn

src/ue4docker/infrastructure/BuildConfiguration.py

@@ -39,6 +39,7 @@
     "5.0.0": 19505902,
     "5.1.0": 23058290,
     "5.2.0": 25360045,
+    "5.3.0": 27405482,
 }