add AnaReentrantAlgorithm

Mostly a copy-and-paste of AnaAlgorithm, with cleanup and updates to inherit from AthReentrantAlgorithm.

Probably the main thing to look for for the reviewer are copy-and-paste errors.

Not sure if it was @tadej, @jburr, or @khoo who kept asking for this, but here it is. Please note that the systematics handles will need updates to work with reentrant algorithms (to say nothing of the ISystematicsTool).

PhysicsAnalysis/D3PDTools/AnaAlgorithm/AnaAlgorithm/AnaAlgorithmDict.h

@@ -6,9 +6,12 @@
 #endif
 
 #include "AnaAlgorithm/AnaAlgorithm.h"
+#include "AnaAlgorithm/AnaReentrantAlgorithm.h"
 #ifdef ROOTCORE
 #include "AnaAlgorithm/AnaAlgorithmConfig.h"
 #include "AnaAlgorithm/AnaAlgorithmWrapper.h"
+#include "AnaAlgorithm/AnaReentrantAlgorithmConfig.h"
+#include "AnaAlgorithm/AnaReentrantAlgorithmWrapper.h"
 #endif
 
 #endif