Rollup merge of #153796 - GokhanKabar:fix-ice-missing-tokens-eii-attr-expansion, r=jdonszelmann

Fix ICE when combining #[eii] with #[core::contracts::ensures]

Fixes rust-lang/rust#153745

Builtin attribute macros like #[eii] generate AST items programmatically without collected tokens. When another attribute macro was present on the same item, the compiler would panic in TokenStream::from_ast() trying to tokenize the generated items during subsequent attribute expansion.

Generate fake token streams (via pretty-print and re-parse) for Item and ForeignItem nodes that lack collected tokens, following the existing pattern used for Crate and out-of-line modules.

Author: JonathanBrouwer