Disable log reloading by default (#9966)

* Disable log reloading by default

This disables the log reloading that was enabled by default. The problem
is that the log reload implementation of `tracing` is using a lock to
make the layer replaceable. This lock needs to be locked every time we
need to check if a particular target is enabled (assuming the log level
is high enough). This kills the performance when for example
`sometarget=trace` logging is enabled.

* 🤦

* Remove unused parameter

* Fix test

* Fix

substrate/client/tracing/src/logging/mod.rs

@@ -197,7 +197,7 @@ impl LoggerBuilder {
 		Self {
 			directives: directives.into(),
 			profiling: None,
-			log_reloading: true,
+			log_reloading: false,
 			force_colors: None,
 		}
 	}