[clang] default clause replaced by otherwise clause for metadirective in OpenMP 5.2 (PR #125648)

[Nico Weber via cfe-commits]

nico wrote:

Looks like this also broke tests on macOS, see http://45.33.8.238/macm1/101361/step_6.txt

Given that a bunch of failures have been reported several hours ago, I'll revert this for now.

https://github.com/llvm/llvm-project/pull/125648