feat(core/rust): allow debug feature in tests (means we can print things)

core/embed/rust/Cargo.toml

@@ -30,11 +30,11 @@ rgb_led = []
 test = [
     "button",
     "cc",
+    "debug",
     "glob",
     "micropython",
     "protobuf",
     "ui",
-    "ui_debug",
     "dma2d",
     "touch",
 ]

core/embed/rust/src/lib.rs

@@ -33,6 +33,7 @@ pub mod ui;
 pub mod strutil;
 
 #[cfg(feature = "debug")]
+#[cfg(not(test))]
 #[panic_handler]
 /// More detailed panic handling. The difference against
 /// default `panic` below is that this "debug" version