Fix unused_peekable closure and f(&mut peekable) false positives

[Alexendoo]

changelog: Fix [unused_peekable] false positive when peeked in a closure or called as f(&mut peekable)

The return/break changes aren't part of the fix, they allow an earlier return in some cases. break is replaced with return for style purposes as they do the same thing in this case

Fixes #9456
Fixes #9462

[rust-highfive]

r? @flip1995

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[Alexendoo]

Not sure on the timing of things but I'll add beta-nominated Nominated for backporting to the compiler in the beta channel. here too

[flip1995]

@bors r+

Thanks! Since this lint was already reported twice I will do a dummy sync with this commit.

[bors]

📌 Commit 86d18b5 has been approved by flip1995

It is now in the queue for this repository.

[bors]

⌛ Testing commit 86d18b5 with merge 9c9aa92...

[bors]

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: flip1995
Pushing 9c9aa92 to master...

[flip1995]

rust-lang/rust#101811