[clang] [Clang] Initialize bypassed variables w/ trivial-auto-var-init (PR #181937)

[Justin Stitt via cfe-commits]

JustinStitt wrote:

@efriedma-quic can you try merging for me?

<img width="510" height="251" alt="image" src="https://github.com/user-attachments/assets/f0d15ce9-4dd1-4b7a-b1ab-3f41f3c78f68" />


https://github.com/llvm/llvm-project/pull/181937