Remove ambient sound from lv/mv/pipes + up default ambience volume (#22536)

* Remove remaining ambientsound enabled overrides on maps

* Disable LV and MV ambience altogether

* hv enable default

* not necessary bc subfloor

* up default volume

* no pipe ambience

* pepis

Resources/Maps/Salvage/small-2.yml

@@ -196,8 +196,7 @@ entities:
     - pos: -1.5,1.5
       parent: 55
       type: Transform
-    - enabled: True
-      type: AmbientSound
+
 - proto: CannedApplauseInstrument
   entities:
   - uid: 75