Merge branch 'iovdbsvc_extensible' into 'master'

HLT: Mark IOVDbSvc folders as extensible in allowCOOLUpdates Modifier

Closes ATR-19393

See merge request atlas/athena!27217

Trigger/TriggerRelease/python/Modifiers.py

@@ -354,7 +354,13 @@ class allowCOOLUpdates(_modifier):
     """
     def postSetup(self):
         if hasattr(svcMgr,'HltEventLoopMgr'):
-            svcMgr.HltEventLoopMgr.CoolUpdateTool.enable() 
+            svcMgr.HltEventLoopMgr.CoolUpdateTool.enable()
+            # Make sure relevant folders are marked as 'extensible'
+            for i, f in enumerate(svcMgr.IOVDbSvc.Folders):
+                if ('/Indet/Onl/Beampos' in f or '/TRIGGER/LUMI/HLTPrefLumi' in f) \
+                   and '<extensible/>' not in f:
+                    svcMgr.IOVDbSvc.Folders[i] += ' <extensible/>'
+                    log.info('IOVDbSvc folder %s not marked as extensible. Fixing this...', f)
 
 class useOracle(_modifier):
     """