[clang] [FixIt] Improve Source Ranges and Fix-It Hints for Unused Lambda Captures #106445 (PR #117953)

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cor3ntin wrote:

@charan-003 Oliver told me you were happy with him taking over in #141148. Can you confirm?
I apologize that we incorrectly identified this bug as a good first issue when it clearly wasn't. Were you able to find other issues to work on?

https://github.com/llvm/llvm-project/pull/117953