Correct default round timings

[AdamTadeusz]

Description

3 mintues 15 seconds long rounds, 15 seconds of which are during the pre-round freeze

Toolchain

• Windows MSVC VS2022
• Linux GCC Distro Native [Specify distro + GCC version]
• Linux GCC 10 Sniper 3.0

Linked Issues

• fixes Snowfall elevator sequence is timed incorrectly #627

[xedmain]

currently on pubs, the timer is commonly set to 2:30 long with 15 (I think) secs of freezetime. perhaps the default timings could be set to the ones commonly used? or should they be parity with vanilla?

[AdamTadeusz]

I think default should be parity, its a convar so can be set easy server to server. The important thing is that the default pre-round freeze time is correct so we don't have this issue on maps like snowfall where things move out of the way at the start of the round