Use tracing-based subscriber logging (#6825)

* init_logger: switch from log-based to tracing-based and add compatibility layer

* Move tracing profiling subscriber related config realization

* sp-tracing: change profiling to be a layer instead of a subscriber

* Enable profiling layer in cli

* Change all test env_logger init to sp_tracing::try_init_simple

* Remove all local env_logger dependency

* Add missing tracing-subscriber dependency

* frame-sudo: fix tests

* frame-support: fix tests

* Fix frame/pallet and executor tests

* Fix the remaining tests

* Use subscriber's try_init as recommended by @davidbarsky

* Be explict that the tracing-log feature is needed

* Set subscriber writer to stderr

* Shorter line width

* Update cargo lock tracing version

* Fix sc_tracing crate compile

* Fix sc_authority_discovery crate test

* unremove default-features

* Leave enabled to default true

* Warn if global default cannot be set

* Fix unused import

* Remove unused PROXY_TARGET

* Change all reference from rc5 to rc6

* Change all reference of rc2 to rc6

* Fix styling

* Fix typo

* make logger init error'ing

* re-fixing the test issue

Co-authored-by: Benjamin Kampmann <ben@parity.io>

substrate/client/authority-discovery/src/worker/tests.rs

@@ -283,7 +283,7 @@ fn new_registers_metrics() {
 
 #[test]
 fn triggers_dht_get_query() {
-	let _ = ::env_logger::try_init();
+	sp_tracing::try_init_simple();
 	let (_dht_event_tx, dht_event_rx) = channel(1000);
 
 	// Generate authority keys
@@ -321,7 +321,7 @@ fn triggers_dht_get_query() {
 
 #[test]
 fn publish_discover_cycle() {
-	let _ = ::env_logger::try_init();
+	sp_tracing::try_init_simple();
 
 	// Node A publishing its address.