Revert "[coroutines] Use DILocation from new storage for hoisted dbg.declare" (#75282)

Reverts llvm/llvm-project#75104

Original commit causes clang to generate invalid IR:
```
mismatched subprogram between llvm.dbg.declare variable and !dbg attachment
  call void @llvm.dbg.declare(metadata ptr %4, metadata !34468, metadata !DIExpression(DW_OP_plus_uconst, 176)), !dbg !34467
```