Adds vars to silence scrapeaway effect announcements AND silences CLF LV Crashed Ship Scrapeaway Announcement for Marines

[DangerRevolution]

About the pull request

1. Adds two variables to skip the announcements on the timed scrapeaway effect

2. Uses one of these variables to silence the scrapeaway effect on LV-624's crashed ship for the Marines.

Explain why it's good for the game

1. More variables is good, and gives a wider range of options to mappers while limiting weird, and irrelevant (if deemed so) announcements to Marines.

1+) One benefit I just thought of while writing this, is informing Marines of unusual inserted chokes by placing a scrapeaway effect on a wall inside the choke (or a wall out of bounds in the right area).

2. This circumvents some metagaming that can be done if Marines are deploying late, as under no other circumstance do Marines get a scrapeaway announcement on LV-624 aside from CLF being present.

Testing Photographs and Procedure

Placed 4 effects on USS Runtime, two muted, two unmuted.

https://youtu.be/85IIgUN1RDg

Video too big for Github...

Changelog

🆑 DangerRevolution
balance: Silenced the Scrapeaway Timed Effect for the Marines during the LV-624 CLF Crashed Ship insert.
code: Added two variables for the scrapeaway timed effect to silence the announcement for Marines, or Xenos, about the walls being deleted.
/:cl: