Tracking Issue: Fix auto-applicable lint suggestions by using multipart suggestions

[flip1995]

Description

#13098 introduced @no-rustfix annotations, that can be removed by changing the suggestion to a multipart suggestion:

//@no-rustfix: need to change the suggestion to a multipart suggestion

The affected test files are:

• [ ] ui-toml/max_suggested_slice_pattern_length/index_refutable_slice.rs
• [x] ui/crashes/ice-3717.rs
• [ ] ui/derivable_impls.rs
• [ ] ui/index_refutable_slice/if_let_slice_binding.rs
• [ ] ui/index_refutable_slice/slice_indexing_in_macro.rs
• [ ] ui/let_unit.rs
• [ ] ui/manual_assert.rs
• [ ] ui/manual_async_fn.rs
• [ ] ui/manual_split_once.rs
• [ ] ui/match_same_arms2.rs
• [ ] ui/significant_drop_tightening.rs
• [ ] ui/unnecessary_iter_cloned.rs
• [ ] ui/unnecessary_to_owned.rs

To fix some of those:

1. Pick one test and leave a comment about it
2. Remove the @no-rustfix annotation
3. Change the lint suggestion building to use multipart_suggestion over the current implementation
4. write a comment here or mention this issue in the PR so that it gets marked as resolved.

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