Introduce v5 data

[TheRealGioviok]

Also introduce parallel data loading on evaltune startup.

Passed STC:

Test  | v5noreplace
Elo   | 1.93 +- 1.55 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.96 (-2.94, 2.94) [0.00, 3.00]
Games | N: 70180 W: 18916 L: 18527 D: 32737
Penta | [994, 8473, 15850, 8696, 1077]

https://ob.cwchess.org/test/1417/

Passed LTC:

Test  | v5noreplace
Elo   | 4.78 +- 2.89 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=64MB
LLR   | 2.96 (-2.94, 2.94) [0.00, 3.00]
Games | N: 16122 W: 4134 L: 3912 D: 8076
Penta | [92, 1834, 4017, 1996, 122]

https://ob.cwchess.org/test/1419/

Bench: 15668761