[10575] Fix world states related to arena season.

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<pre>m src/game/Player.cpp
m src/game/World.cpp
m src/game/World.h
m src/mangosd/mangosd.conf.dist.in
m src/shared/revision_nr.h
</pre>
<pre style='white-space:pre-wrap;width:81ex'>[10575] Fix world states related to arena season.

Replace the "in progress" option in config (as no such thing exist) with the expected "previous arena season id".

Signed-off-by: NoFantasy <nofantasy@nf.no></pre>




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