Avoid reducing move horizon in cyclic time controls
Fixes losses on time in cyclic time controls.
Results of master vs fix (40/1, 1t, 64MB, UHO_Lichess_4852_v1.epd):
Elo: -48.65 +/- 9.84, nElo: -76.63 +/- 15.29
LOS: 0.00 %, DrawRatio: 40.83 %, PairsRatio: 0.48
Games: 1984, Wins: 451, Losses: 727, Draws: 806, Points: 854.0 (43.04 %)
Ptnml(0-2): [81, 316, 405, 178, 12], WL/DD Ratio: 1.60
Master timeouts: 557, Fix timeouts: 0
Results of master vs fix (40/10, 1t, 64MB, UHO_Lichess_4852_v1.epd):
Elo: -8.10 +/- 3.45, nElo: -15.98 +/- 6.81
LOS: 0.00 %, DrawRatio: 52.00 %, PairsRatio: 0.84
Games: 10000, Wins: 2463, Losses: 2696, Draws: 4841, Points: 4883.5 (48.84 %)
Ptnml(0-2): [39, 1268, 2600, 1073, 20], WL/DD Ratio: 1.08
Master timeouts: 116, Fix timeouts: 0
closes https://github.com/official-stockfish/Stockfish/pull/7117
No functional change