Rollup merge of #141812 - JonathanBrouwer:fix-else-if-help, r=jdonszelmann

Fix "consider borrowing" for else-if

Fixes rust-lang/rust#141810

When trying to suggest a borrow on a `if` or `block` expression, instead we now recurse into the `if` or `block`.
The comments in the code should explain the goal of the new code.

r? ``@jdonszelmann``

Author: jhpratt