llvm-wrapper: adapt for LLVM API change No functional changes intended. LLVM commit https://github.com/llvm/llvm-project/commit/633f5663c37a670e28040cadd938200abd854483 removed `createWriteThinLTOBitcodePass`. This adapts PassWrapper similarly to the example mentioned upstream: https://github.com/llvm/llvm-project/commit/853b57fe80bdb9d6b19697e6f2abc734834e9f6d. Detected via our experimental rust + llvm @ head bot: https://buildkite.com/llvm-project/rust-llvm-integrate-prototype/builds/12768#0182a6be-ed6e-4dc6-a230-7a46f9d3a2c2/205-537