Apply good/bad history reduction also when inCheck

Main idea is that, in some cases, 'in check' situations are not so different from 'not in check' ones.
Trying to use piece count in order to select only a few 'in check' situations have failed LTC testing.
It could be interesting to apply one of those ideas in other parts of the search function.

passed STC:
https://tests.stockfishchess.org/tests/view/60f1b68dd1189bed71812d40
LLR: 2.93 (-2.94,2.94) <-2.50,0.50>
Total: 53472 W: 4078 L: 4008 D: 45386
Ptnml(0-2): 127, 3297, 19795, 3413, 104

passed LTC:
https://tests.stockfishchess.org/tests/view/60f291e6d1189bed71812de3
LLR: 2.92 (-2.94,2.94) <-2.50,0.50>
Total: 89712 W: 2651 L: 2632 D: 84429
Ptnml(0-2): 60, 2261, 40188, 2294, 53

closes https://github.com/official-stockfish/Stockfish/pull/3619

Bench: 5185789

AUTHORS

@@ -69,6 +69,7 @@ gamander
 Gary Heckman (gheckman)
 George Sobala (gsobala)
 gguliash
+Giacomo Lorenzetti (G-Lorenz)
 Gian-Carlo Pascutto (gcp)
 Gontran Lemaire (gonlem)
 Goodkov Vasiliy Aleksandrovich (goodkov)

src/search.cpp

@@ -1172,8 +1172,7 @@ moves_loop: // When in check, search starts from here
                              - 4923;
 
               // Decrease/increase reduction for moves with a good/bad history (~30 Elo)
-              if (!ss->inCheck)
-                  r -= ss->statScore / 14721;
+              r -= ss->statScore / 14721;
           }
 
           // In general we want to cap the LMR depth search at newDepth. But if