Opens up FORECON crashsite to regular play while maintaining the surv…

…ivor democharge objective (#6051)

# About the pull request

title

# Explain why it's good for the game

Allows marines and xenos more routes to fight/escape from if they get
cornered while maintaining FORECON needing a breaching charge to get
into the shuttle


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:SpartanBobby
maptweak: LV522 Cargo containers keeping FORECON out of the crashed ship
have been moved back slightly allowing marines and xenos a new flank
route
/:cl: