tests: remove deprecated hsail gpu_hello

tests: remove deprecated hsail gpu_hello

Change-Id: I7e15075e7805af732e89c3269fdff9d65a144219
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29921
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Xianwei Zhang <xianwei.zhang@amd.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>