Suggest function call on pattern type mismatch Fixes #101208 This could definitely be generalized to support more suggestions in pattern matches. We can't use all of [`FnCtxt::emit_type_mismatch_suggestions`](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir_typeck/fn_ctxt/struct.FnCtxt.html#method.emit_type_mismatch_suggestions), but it's on my to-do list to play around with more suggestions that would be productive in this position.