[clang] [llvm] [Sanitizer] Convert SpecialCaseList::Sections from StringMap to vector. (PR #140127)

[Vitaly Buka via cfe-commits]

https://github.com/vitalybuka approved this pull request.

Please use tag [NFC] or [NFCI] if the patch does not change any functionality.

https://github.com/llvm/llvm-project/pull/140127