fix(cs2server): use cs2.sh script instead of cs2 binary for server startup (#4843)

Update CS2 server launch to use the cs2.sh script as recommended by Valve.
The script properly sets LD_LIBRARY_PATH environment variable, which is required after recent CS2 updates.

Closes #4842

Co-authored-by: Daniel Gibbs <me@danielgibbs.co.uk>

lgsm/config-default/config-lgsm/cs2server/_default.cfg

@@ -163,8 +163,8 @@ glibc="2.31"
 
 ## Game Server Directories
 systemdir="${serverfiles}/game/csgo"
-executabledir="${serverfiles}/game/bin/linuxsteamrt64"
-executable="./cs2"
+executabledir="${serverfiles}/game"
+executable="./cs2.sh"
 servercfgdir="${systemdir}/cfg"
 servercfg="${selfname}.cfg"
 servercfgdefault="server.cfg"