Merge branch 'AM_datatype' into 'master'

For DPA: Make the data_type optional as "data_type:Upgrade" is meaningless

See merge request !4496

GaudiConf/python/GaudiConf/LbExec/options.py

 ###############################################################################
-# (c) Copyright 2022-2023 CERN for the benefit of the LHCb Collaboration      #
+# (c) Copyright 2022-2024 CERN for the benefit of the LHCb Collaboration      #
 #                                                                             #
 # This software is distributed under the terms of the GNU General Public      #
 # Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   #
@@ -32,7 +32,7 @@ from PyConf.packing import default_persistreco_version
 
 
 class HltSourceID(str, Enum):
-    """ possible values of the Hlt source ID used to identify the origin of 
+    """ possible values of the Hlt source ID used to identify the origin of
          the data in the various rawbanks produced by Hlt and/or Sprucing
      """
     Hlt1 = "Hlt1"
@@ -116,7 +116,7 @@ class CompressionSettings(BaseModel):
 
 class Options(BaseModel):
     """Conditions"""
-    data_type: DataTypeEnum
+    data_type: Optional[DataTypeEnum] = "Upgrade"
     simulation: bool
     dddb_tag: Optional[str] = None
     conddb_tag: Optional[str] = None