[1860] fix player value in game variant

[philcampeau]

Fixes #11332

Before clicking "Create"

• Branch is derived from the latest master
• Add the pins or archive_alpha_games label if this change will break existing games
• Code passes linter with docker compose exec rack rubocop -a
• Tests pass cleanly with docker compose exec rack rake

Implementation Notes

Explanation of Change

With the non_operated_full_value variant, when I modified the def player_value code, I forgot to add in the value of shares of corps with trains. Admittedly a big oversight!

I suspect we'll need to pin any finished games on that variant, since their recorded final scores will be incorrect.

Screenshots

Any Assumptions / Hacks

[roseundy]

@philcampeau - did the original change affect liquidity? If so, I'm not sure where that happened - but I'm at work and can't poke around the code very well.