Balatro: Fix missing execution flags on 7za.aarch64 and enforce it by adding chmod in the launch script

[cdeletre]

Fix this issue for Balatro on Knulli (and maybe other aarch64 cfw):

/userdata/roms/ports/Balatro.sh: line 46: ./bin/7za.aarch64: Permission denied
sed: can't read globals.lua: No such file or directory
sed: can't read globals.lua: No such file or directory
sed: -e expression #1, char 18: unknown option to `s'
sed: can't read globals.lua: No such file or directory
sed: can't read globals.lua: No such file or directory
sed: can't read globals.lua: No such file or directory
/userdata/roms/ports/Balatro.sh: line 63: ./bin/7za.aarch64: Permission denied
/userdata/roms/ports/Balatro.sh: line 68: ./bin/7za.aarch64: Permission denied
rm: cannot remove 'globals.lua': No such file or directory
/userdata/roms/ports/Balatro.sh: line 117: ./bin/love.aarch64: Permission denied
/userdata/roms/ports/Balatro.sh: line 123: systemctl: command not found

see discussion on Discord here for more details