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/primitives/tracing/src/lib.rs

@@ -44,6 +44,13 @@ pub mod proxy;
 #[cfg(feature = "std")]
 use std::sync::atomic::{AtomicBool, Ordering};
 
+/// Try to init a simple tracing subscriber with log compatibility layer.
+/// Ignores any error. Useful for testing.
+#[cfg(feature = "std")]
+pub fn try_init_simple() {
+	let _ = tracing_subscriber::fmt().with_writer(std::io::stderr).try_init();
+}
+
 /// Flag to signal whether to run wasm tracing
 #[cfg(feature = "std")]
 static WASM_TRACING_ENABLED: AtomicBool = AtomicBool::new(false);
@@ -114,4 +121,4 @@ pub fn wasm_tracing_enabled() -> bool {
 #[cfg(feature = "std")]
 pub fn set_wasm_tracing(b: bool) {
 	WASM_TRACING_ENABLED.store(b, Ordering::Relaxed)
-}
+}