[llvm] [LLVM] Update ARM maintainer (PR #117002)

[Anton Korobeynikov via llvm-commits]

asl wrote:

> Related to this @asl you are currently listed as the maintainer for ARM EABI at https://github.com/llvm/llvm-project/blob/main/llvm/Maintainers.md#arm-eabi. Is that still up to date?

I think ARM EABI support is done for many years as of now. And given that these days we are having ARM compiler team contributing, it seems natural to move everything ARM-related to them :)

https://github.com/llvm/llvm-project/pull/117002