Military searchlight (fixed merge conflicts)

This is dublicate of https://github.com/CleverRaven/Cataclysm-DDA/pull/8500, but with fixed merge conflicts.
@KA101 hi. 

You suggest:
>"As you destroy the final light, it erupts in a blinding flare!"

I used more generic words, because not only user can destroy searchlight, but turrets someties etc.