Auto merge of #127543 - carbotaniuman:more_unsafe_attr_verification, r=estebank,traviscross

More unsafe attr verification

This code denies unsafe on attributes such as `#[test]` and `#[ignore]`, while also changing the `MetaItem` parsing so `unsafe` in args like `#[allow(unsafe(dead_code))]` is not accidentally allowed.

Tracking:

- https://github.com/rust-lang/rust/issues/123757

compiler/rustc_parse/src/errors.rs

@@ -3183,6 +3183,7 @@ pub(crate) struct DotDotRangeAttribute {
 #[note]
 pub struct InvalidAttrUnsafe {
     #[primary_span]
+    #[label]
     pub span: Span,
     pub name: Path,
 }