[clang] [Clang][DebugInfo] Clang generates an extra spurious unnamed 'dbg.declare' (PR #69681)

[Carlos Alberto Enciso via cfe-commits]

CarlosAlbertoEnciso wrote:

Uploaded new patch to address minor details with the test case:
- Added check for missing captured `a` variable.
- Check for the specific values in `DW_OP_plus_uconst`.

https://github.com/llvm/llvm-project/pull/69681