gives trucker construction skills (#5231)

# About the pull request
Gives trucker engineering construction skills

# Explain why it's good for the game

It is strange to have engineering survivor who can not build cades and
walls and it sucks when you have 3 truckers but none able to build
openable cades. Giving more skills to survivors should make playing
survivor more fun. Trucker still has other diferent skill and gets
diferent loudout from engineer

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

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# Changelog
:cl:
balance: gives trucker engineer level construction skill
/:cl:

code/datums/skills/civilian.dm

@@ -160,6 +160,7 @@ CIVILIAN
 	name = "Survivor Trucker"
 	additional_skills = list(
 		SKILL_ENGINEER = SKILL_ENGINEER_ENGI,
+		SKILL_CONSTRUCTION = SKILL_CONSTRUCTION_ENGI,
 		SKILL_VEHICLE = SKILL_VEHICLE_CREWMAN,
 	)