[lldb] [llvm] [LLDB] Switch to using DIL as default implementation for 'frame var'. (PR #147887)

[Pavel Labath via llvm-commits]

labath wrote:

It looks like this just barely didn't make it into the 21.x release branch. Do we want to cherry-pick that over? I think it would be a good way to flush out any issues...

https://github.com/llvm/llvm-project/pull/147887