Move ITRT_ActiveFractionSvc.h from TRT_ConditionsServices to InDetRecToolInterfaces

As discussed in ATLASRECTS-2953, in order to be able to drop the dependency on
the `TrkParameters` package from AthSimulation, then we need to move
`ITRT_ActiveFractionSvc.h` and `TRT_ActiveFractionSvc.h` out of the
`TRT_ConditionsServices` package. The first step is to move the interface elsewhere.

InnerDetector/InDetConditions/TRT_ConditionsServices/CMakeLists.txt

@@ -29,6 +29,7 @@ atlas_depends_on_subdirs( PUBLIC
                           InnerDetector/InDetConditions/InDetCoolCoralClientUtils
                           InnerDetector/InDetDetDescr/InDetIdentifier
                           InnerDetector/InDetDetDescr/InDetReadoutGeometry
+                          InnerDetector/InDetRecTools/InDetRecToolInterfaces
                           Tools/PathResolver )
 
 # External dependencies:

InnerDetector/InDetConditions/TRT_ConditionsServices/src/TRT_ActiveFractionSvc.h

@@ -13,7 +13,7 @@
  *///-------------------------------------------------------
 
 // Header Includes
-#include "TRT_ConditionsServices/ITRT_ActiveFractionSvc.h"
+#include "InDetRecToolInterfaces/ITRT_ActiveFractionSvc.h"
 #include "AthenaBaseComps/AthService.h"
 #include "GaudiKernel/IIncidentListener.h"
 #include "GaudiKernel/ServiceHandle.h"

InnerDetector/InDetRecTools/InDetTrackSelectorTool/src/InDetTrtDriftCircleCutTool.cxx

@@ -3,7 +3,7 @@
 */
 
 #include "InDetTrackSelectorTool/InDetTrtDriftCircleCutTool.h"
-#include "TRT_ConditionsServices/ITRT_ActiveFractionSvc.h"
+#include "InDetRecToolInterfaces/ITRT_ActiveFractionSvc.h"
 
 StatusCode  InDet::InDetTrtDriftCircleCutTool::initialize()
 {