Balancing adjustments for multiplayer encounters

Added new ammunition for Leopard 1A1.
Fixed the issue of OBJ906 not reloading.
Other bug fixes and adjustments.

In sync with the recent game update:

Fixed some bugs.
Added M1A1HA and BMD-2.
New feature:
The BMD series now has a variable-height suspension function.

fixed IP-TOW issue.
leopard 2a4 now will appear at 13 days in conquest
up vdv health.

When supply trucks are destroyed now, they will generate a severe explosion.but Only large-caliber high-explosive shells can directly trigger an explosion. Armor-piercing shells, small-caliber artillery shells, and light weapons will only destroy the vehicle. Furthermore, collisions nowadays can damage vehicles but will not cause them to explode.

Add night vision for T-80B

The composite armor values of T-80BV have been Fixed

The appearance time of advanced units has been adjusted, and they will now appear earlier on the battlefield.

The prices of certain units have been adjusted，to align it with its actual performance.

The bug with AAMG has been fixed to prevent the occurrence of the "remote-controlled machine gun" state.

调整了高级单位出现的时间，它们现在会更早的出现在战场上。
调整了某些单位的价格，以使其与实际性能相符。

修正了AAMG的bug，防止出现“遥控机枪”的状态。