[llvm] [LLVM] Update ADT/Support maintainers (PR #120423)

[Chandler Carruth via llvm-commits]

chandlerc wrote:

> Currently @chandlerc is listed as the maintainer for this area. I know you recently picked up some LLVM contribution again, so let me know if you'd like to still be listed as an active maintainer for ADT/Support.

I've been meaning to remove myself from here for a year now... This is a welcome fix for me.

While I'm enjoying getting to fix things here and there, others are definitely the right maintainers at this point. Very happy with the two nominations you have here. =D

https://github.com/llvm/llvm-project/pull/120423