[10713] player/group instance binding fixes.

[newsbot]

<pre>m src/game/Group.cpp
m src/game/Group.h
m src/game/Level1.cpp
m src/game/Map.cpp
m src/game/Map.h
m src/game/Player.cpp
m src/game/Player.h
m src/game/SharedDefines.h
m src/shared/revision_nr.h
</pre>
<pre style='white-space:pre-wrap;width:81ex'>[10713] player/group instance binding fixes.

* Use anum instead raw uint8 type in args
* Fixed crash when gm at continent invite to group gm in instance
and then teleport to instance using .goname.
When group leader teleport to instance it must get group bind instead solo bind.
* In other semilar cases detection report error as before but replace solo by group bind instead
assert crash at enter to map.</pre>




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