[llvm] [Dexter] Add rewriting for aggregate variables (PR #202800)

[Stephen Tozer via llvm-commits]

SLTozer wrote:

Reverted in #206495 as it seems to be causing pre-merge CI failures (example: https://github.com/llvm/llvm-project/actions/runs/28374916045/job/84061890051?pr=206486). Very unclear what causes this, possibly an unspecified environmental dependency related to either python or lldb.

https://github.com/llvm/llvm-project/pull/202800