Separate eval params for smallnet and main net
Values found with spsa around 80% of 120k games at 60+0.6:
https://tests.stockfishchess.org/tests/view/669205dac6827afcdcee3ea4
Passed STC:
https://tests.stockfishchess.org/tests/view/6692928b4ff211be9d4e98a9
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 313696 W: 81107 L: 80382 D: 152207
Ptnml(0-2): 934, 36942, 80363, 37683, 926
Passed LTC:
https://tests.stockfishchess.org/tests/view/6692aab54ff211be9d4e9915
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 228420 W: 57903 L: 57190 D: 113327
Ptnml(0-2): 131, 25003, 63243, 25688, 145
closes https://github.com/official-stockfish/Stockfish/pull/5486
bench 1319322