fix: fix the capture behavior of if let in closures#154210

Embers-of-the-Fire wants to merge 4 commits intorust-lang:mainrust-lang/rust:mainfrom

Embers-of-the-Fire:feat/if-let-no-full-captureEmbers-of-the-Fire/rust:feat/if-let-no-full-captureCopy head branch name to clipboard