[clang] [clang-repl] Emit const variables only once (PR #65257)

[Vassil Vassilev via cfe-commits]

https://github.com/vgvassilev approved this pull request.

That looks good to me. Can we backport that to the llvm17 release branch? I know at least one downstream project that jumps through hoops to support this.

https://github.com/llvm/llvm-project/pull/65257