[llvm-branch-commits] [clang] Release/20.x: [clang-format] Set C11 instead of C17 for LK_C (PR #134514)

[Owen Pan via llvm-branch-commits]

owenca wrote:

Copied the entire `getFormattingLangOpts()` function from commit d71ee7d23048ca64d14a7536927a006867cea39a to resolve conflicts.

https://github.com/llvm/llvm-project/pull/134514