Discussion thread: https://lists.llvm.org/pipermail/llvm-dev/2021-January/148048.html
Move debuginfo-test into a subdirectory of a new top-level directory, called cross-project-tests. The new name replaces "debuginfo-test" as an LLVM project enabled via LLVM_ENABLE_PROJECTS.
Depends on D101982.
clang-tidy: warning: header is missing header guard [llvm-header-guard]
not useful
clang-format: please reformat the code