Remove get_ prefix on getters

Part of #6224

I certainly didn't remove all of them; I avoided `unsafe` areas and also `components/script`

components/devtools/actor.rs

@@ -120,7 +120,7 @@ impl ActorRegistry {
     }
 
     /// Get start stamp when registry was started
-    pub fn get_start_stamp(&self) -> PreciseTime {
+    pub fn start_stamp(&self) -> PreciseTime {
         self.start_stamp.clone()
     }