Auto merge of #104799 - pcc:linkage-fn, r=tmiasko

Support Option and similar enums as type of static variable with linkage attribute

Compiler MCP:
rust-lang/compiler-team#565

compiler/rustc_hir_analysis/src/errors.rs

@@ -289,3 +289,10 @@ pub struct SelfInImplSelf {
     #[note]
     pub note: (),
 }
+
+#[derive(Diagnostic)]
+#[diag(hir_analysis_linkage_type, code = "E0791")]
+pub(crate) struct LinkageType {
+    #[primary_span]
+    pub span: Span,
+}