Ignore the registry config if the provided config path is not valid to read

Author: yma955

charon/config.py

@@ -66,8 +66,10 @@ def validate(self) -> bool:
         if self.__quay_radas_registry_config and not os.access(
             self.__quay_radas_registry_config, os.R_OK
         ):
-            logger.error("The quay registry config for oras is not valid!")
-            return False
+            self.__quay_radas_registry_config = None
+            logger.warning(
+                "The quay registry config for oras is not valid, will ignore the registry config!"
+            )
         return True
 
     def umb_target(self) -> str: