Auto merge of #58994 - oli-obk:deprecated_derive, r=petrochenkov

Hide deprecation warnings inside derive expansions

Fixes #58822

src/test/ui/deprecation/derive_on_deprecated.rs

@@ -0,0 +1,9 @@
+// compile-pass
+
+#![deny(deprecated)]
+
+#[deprecated = "oh no"]
+#[derive(Default)]
+struct X;
+
+fn main() {}

src/test/ui/deprecation/derive_on_deprecated_forbidden.rs

@@ -0,0 +1,9 @@
+// compile-pass
+
+#![forbid(deprecated)]
+
+#[deprecated = "oh no"]
+#[derive(Default)]
+struct X;
+
+fn main() {}