Introduce DFRC v2 data

[TheRealGioviok]

Small but welcome gains in classical, huge gains in dfrc. Seems also to scale quite well. Unfortunately we lost more than half dfrcv2 data to ob bug.

Passed classical STC

Test  | dfrcv2oops
Elo   | 2.09 +- 1.66 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.96 (-2.94, 2.94) [0.00, 3.00]
Games | N: 56816 W: 14094 L: 13753 D: 28969
Penta | [616, 6848, 13201, 7065, 678]

https://ob.cwchess.org/test/1142/

Passed DFRC STC

Test  | dfrcv2oops
Elo   | 13.64 +- 5.61 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.95 (-2.94, 2.94) [0.00, 3.00]
Games | N: 5964 W: 1507 L: 1273 D: 3184
Penta | [105, 635, 1306, 793, 143]

https://ob.cwchess.org/test/1144/

Passed classical LTC

Test  | dfrcv2oops
Elo   | 2.66 +- 1.96 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=64MB
LLR   | 2.96 (-2.94, 2.94) [0.00, 3.00]
Games | N: 34268 W: 8135 L: 7873 D: 18260
Penta | [180, 4006, 8528, 4212, 208]

https://ob.cwchess.org/test/1145/

Passed DFRC LTC

Test  | dfrcv2oops
Elo   | 16.26 +- 5.81 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=64MB
LLR   | 2.95 (-2.94, 2.94) [0.00, 3.00]
Games | N: 4362 W: 970 L: 766 D: 2626
Penta | [36, 429, 1068, 591, 57]

https://ob.cwchess.org/test/1146/

Bench: 14488986