feat: rely on tracing-subscriber in tests (#4950)

`tracing` crate is already used within the codebase, this change allows
developers to benefit from that functionality when running and debugging
tests

Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>

Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>

crates/test-programs/tests/wasm_tests/main.rs

@@ -7,9 +7,7 @@ use std::sync::Once;
 static LOG_INIT: Once = Once::new();
 
 fn setup_log() {
-    LOG_INIT.call_once(|| {
-        pretty_env_logger::init();
-    })
+    LOG_INIT.call_once(tracing_subscriber::fmt::init)
 }
 
 include!(concat!(env!("OUT_DIR"), "/wasi_tests.rs"));