Generalize the EvalFile net option detection

[ppigazzini]

Stockfish will use more than one net with
official-stockfish/Stockfish#4915

Get all the couples "option" and "net names" from the output of the
stockfish uci command.

Raise worker version to 227 (also server side)

[mstembera]

@ppigazzini Thank you for this. Is this the last thing needed on the fishtest side before official-stockfish/Stockfish#4915 can be merged?

[mstembera]

@ppigazzini Can you please commit this so we can proceed with official-stockfish/Stockfish#4915 ? Ty!

[peregrineshahin]

Maybe ppigazzini realized a big flaw in this PR and still thinking about the solution ;) ..

[Disservin]

btw we should also update the memory requirements even though it's not much I guess.
The second net is 3MB, the current main net is estimated to be around 80MB in fishtest code which I think is still an old value, because the net file is around ~64MB.

Also fishtest and the worker are out of sync regarding that.
https://github.com/official-stockfish/fishtest/blob/master/server/fishtest/rundb.py#L1108
https://github.com/official-stockfish/fishtest/blob/master/worker/worker.py#L800

the server code is missing the 16MB ?

[ppigazzini]

Tested with workers: msys2, linux (python 3.6.8) with:

• sf_11 vs master
• sf_classical vs master
• sf_12 vs master
• SF_NNUE vs master
• DualNNUE-1100-pr vs master

DualNNUE-1100-pr requires 'option.EvalFile=nn-0000000000a0.nnue', 'option.EvalFileSmall=nn-c01dc0ffeede.nnue'

[ppigazzini]

Triggered the worker update, of course.

[Disservin]

Thanks. I made a PR for the according Stockfish changes.