TRT_PAI_Process configuration module renaming

Follows the changes in !55567 (merged).

The old-style simulation configuration uses ConfiguredFactory. This uses configuration methods defined in ...Config.py modules which are associated with a component name in various PackageNameConfigDb.py modules.

The new ComponentAccumulator-based configuration tends to use ...Config.py as the naming convention for the configuration modules, but in Simulation we have typically used ...ConfigNew.py to avoid a naming clash. This MR renames all the ConfiguredFactory ...Config.py modules under TRT_PAI_Process to ...ConfigLegacy.py. In the second commit we rename the modules containing the CA-based configuration for TRT_PAI_Process packages from ...ConfigNew.py to ...Config.py so that they are consistent with the rest of the CA-based configuration.

NB Please consider the changes in the two commits separately as the combination makes it look like the changes are more complex than they actually are.

InnerDetector/InDetDigitization/TRT_Digitization/python/TRT_DigitizationConfig.py

@@ -7,9 +7,7 @@ from AthenaConfiguration.ComponentFactory import CompFactory
 from AthenaConfiguration.Enums import BeamType, ProductionStep
 from TRT_GeoModel.TRT_GeoModelConfig import TRT_ReadoutGeometryCfg
 from MagFieldServices.MagFieldServicesConfig import AtlasFieldCacheCondAlgCfg
-from TRT_PAI_Process.TRT_PAI_ProcessConfigNew import TRT_PAI_Process_XeToolCfg
-from TRT_PAI_Process.TRT_PAI_ProcessConfigNew import TRT_PAI_Process_ArToolCfg
-from TRT_PAI_Process.TRT_PAI_ProcessConfigNew import TRT_PAI_Process_KrToolCfg
+from TRT_PAI_Process.TRT_PAI_ProcessConfig import TRT_PAI_Process_XeToolCfg, TRT_PAI_Process_ArToolCfg, TRT_PAI_Process_KrToolCfg
 from IOVDbSvc.IOVDbSvcConfig import addFolders
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
 from Digitization.PileUpToolsConfig import PileUpToolsCfg