Remove instrumenting log level (#7620)

I think this should resolve #7155


This removes the level field from the instrumenting we were doing across a range of functions. The level will now default to the level of the log.

beacon_node/network/src/sync/range_sync/range.rs

@@ -82,7 +82,6 @@ where
     T: BeaconChainTypes,
 {
     #[instrument(parent = None,
-        level = "info",
         fields(component = "range_sync"),
         name = "range_sync",
         skip_all