23.0-coverity-InDetEventCnv

(Hopefully) resolving all coverity defects in InDetEventCnv. Started by addressing 18076-18078 (no need to check pointer, when this is done in the function and returned as a bool), introduced in January 2023. Continued to check dynamic casts where necessary. Some tidying of headers also done.

InnerDetector/InDetEventCnv/BCM_RawDataByteStreamCnv/BCM_RawDataByteStreamCnv/BCM_RawContByteStreamCnv.h

@@ -17,11 +17,9 @@
 
 #include "AthenaBaseComps/AthConstConverter.h"
 
-#include "ByteStreamData/RawEvent.h" 
-
 class BCM_RawContByteStreamTool;
-class IByteStreamEventAccess;
-class StoreGateSvc;
+class IOpaqueAddress;
+class DataObject;
 
 class BCM_RawContByteStreamCnv: public AthConstConverter {