Rollup merge of #136393 - oli-obk:pattern-type-lit-oflo-checks, r=compiler-errors

Fix accidentally not emitting overflowing literals lints anymore in patterns

This was regressed in rust-lang/rust#134228 (not in beta yet).

The issue was that previously we nested `hir::Expr` inside `hir::PatKind::Lit`, so it was linted by the expression code.

So now I've set it up for visitors to be able to directly visit literals and get all literals

Author: matthiaskrgr