add g_tdm_teams_override and g_domination_teams_override to cvar whitelist

Modifying default team number for gametype tdm or dom makes server impure

g_tdm_teams_override "3" // "0" g_domination_teams_override "3" // "0"

ca, freezetag and keyhunt are already whitelisted grep teams_override g_world.qc BADCVAR("g_ca_teams_override"); BADCVAR("g_freezetag_teams_override"); BADCVAR("g_keyhunt_teams_override");