[lldb] [clang] [clang][DebugInfo] Emit global variable definitions for static data members with constant initializers (PR #70639)

[via cfe-commits]

zmodem wrote:

This causes Clang to assert:

```
      llvm/lib/IR/Metadata.cpp:689:
      void llvm::MDNode::resolve(): Assertion `isUniqued() && "Expected this to be uniqued"' failed.
```

See https://bugs.chromium.org/p/chromium/issues/detail?id=1500262#c1 for a reproducer.

I'll revert to green.

https://github.com/llvm/llvm-project/pull/70639