Introduce Material Correction History

Idea from Caissa (https://github.com/Witek902/Caissa) chess engine.

Add a secondary correction history indexed by the material key of a position.
The material key is the zobrist hash representing the number of pieces left in a
position.

Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 189472 W: 49360 L: 48813 D: 91299
Ptnml(0-2): 666, 22453, 47953, 22996, 668
https://tests.stockfishchess.org/tests/view/66cbddafbf8c9d8780fda9f1

Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 224190 W: 57022 L: 56312 D: 110856
Ptnml(0-2): 197, 24723, 61540, 25443, 192
https://tests.stockfishchess.org/tests/view/66cd529bbf8c9d8780fdab4c

closes https://github.com/official-stockfish/Stockfish/pull/5556

Bench: 1462697

src/search.h

@@ -277,11 +277,12 @@ class Worker {
     void ensure_network_replicated();
 
     // Public because they need to be updatable by the stats
-    ButterflyHistory      mainHistory;
-    CapturePieceToHistory captureHistory;
-    ContinuationHistory   continuationHistory[2][2];
-    PawnHistory           pawnHistory;
-    CorrectionHistory     correctionHistory;
+    ButterflyHistory          mainHistory;
+    CapturePieceToHistory     captureHistory;
+    ContinuationHistory       continuationHistory[2][2];
+    PawnHistory               pawnHistory;
+    PawnCorrectionHistory     pawnCorrectionHistory;
+    MaterialCorrectionHistory materialCorrectionHistory;
 
    private:
     void iterative_deepening();