修复func_tanktrain垂直移动并与玩家直接接触时造成的服务器卡顿问题

再次尝试修复gravity相关的服务器卡顿问题

提升lightmap到8K
修复trigger_gravity可能导致的服务器卡顿

修复csgo版本存在的两个bug：
增加下水道通道的向外push，现在它将和下水道中枢的通风管的向内push一起被禁用（防止僵尸直接爬上通风管道）
增加勋章放置处的触发隔断，现在只有取下下水道中枢的电源插头一定时间后才可放置勋章（防止僵尸放置勋章，提前触发）

Fixed two bugs in the csgo version:
Increased the outward push of sewer channels, it will now be disabled along with the inward push of the vent ducts in the sewer center (prevents zombies from climbing directly up the vent ducts)
Increased trigger partition for medal placement, now MEDALS can only be placed after removing the power plug of the sewer center for a certain amount of time (prevent zombies from placing MEDALS, triggering in advance)

修复下水道中枢的光照
Repair the light in the sewer center

修复最后点位的警报声循环
Fixed the alarm loop in the end

delete some old particle effects
change scale of particle effects

删除无用的粒子特效
改变某些粒子特效的尺寸

fix nuke （maybe）

可能修复了核爆

fix cubemap

修复反射球

Put off push at the telpher site

推迟在缆车位置下方的push，现在它会在缆车靠近底部时才会禁用

Increased physical collision in the hole

增加降落隧道的物理碰撞，防止僵尸跳跃到终点