[llvm-branch-commits] [NFC][SpecialCaseList] Use BumpPtrAllocator to own strings (PR #162304)

[Vitaly Buka via llvm-branch-commits]

https://github.com/vitalybuka created https://github.com/llvm/llvm-project/pull/162304

This simplifies structure of GlobMatcher, and
avoids "no copy/move" requirement.