Auto merge of #13715 - feniljain:fix_completions, r=jonas-schievink

fix: breaking snippets on typed incomplete suggestions

Possible fix for #7929

Fix the case where if a user types `&&42.o`, snippet completion was still applying &&Ok(42). Note this was fixed previously on `&&42.` but this still remained a problem for this case

Previous relevant PR: #13517

### Points to help in review:

- The main problem why everything broke on adding an extra `o` was, earlier `dot_receiver` was `42.` which was a `LITERAL` but now `42.o` becomes a `FIELD_EXPR`

- Till now `include_references` was just checking for parent of `LITERAL` and if it was a `REF_EXPR`, but now we consider `FIELD_EXPR` and traverse all of them, finally to reach `REF_EXPR`. If `REF_EXPR` is not found we  just return the original `initial_element`

- We are constructing a new node during `include_references` because if we rely on `dot_receiver` solely we would get `&&42.o` to be replaced with, but we want `&&42` to be replaced with

### Output Video:

https://user-images.githubusercontent.com/49019259/205420166-efbdef78-5b3a-4aef-ab4b-d892dac056a0.mov

Hope everything I wrote makes sense 😅

Also interestingly previous PR's number was `13517` and this PR's number is `13715`, nicee

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