LV Comms Update (#4469)

# About the pull request

This PR updates the telecomms around the map. There is a guaranteed
telecomms spawn in the Tcomms area of the map. Additionally, the west
and east bank rivers have had their areas altered to make them easier to
siege for xenos.

# Explain why it's good for the game

Xenos can finally weed the tcomms units and properly siege them, and the
extremely enclosed tcomms units have been opened up to make them less
claustrophobic. Done at the request of @morrowwolf.

# Testing Photographs and Procedure

<details>
<summary>Screenshots & Videos</summary>


![image](https://github.com/cmss13-devs/cmss13/assets/133173804/9743d88c-2be3-48a0-b989-eef6dc6d96bd)


![image](https://github.com/cmss13-devs/cmss13/assets/133173804/f846f90f-e142-4037-b832-f1552d9f8cf1)


![image](https://github.com/cmss13-devs/cmss13/assets/133173804/e9581e81-b4a8-4ede-a6c0-7b5952e9de8c)


</details>


# Changelog

:cl:
balance: Comms areas around the east/west rivers expanded for easier
sieges and weedable now.
maptweak: LV Comms now always spawn in Tcomms and one either on the east
or west river
/:cl: