Switch amdgpu-install usecase only to openmpsdk

This should provide a more minimal install for just what  is needed to
get amdflang and amdclang

.github/workflows/linux-amdflang-cmake.yaml

@@ -45,7 +45,7 @@ jobs:
            sudo apt update -y
            wget https://repo.radeon.com/amdgpu-install/6.1.1/ubuntu/jammy/amdgpu-install_6.1.60101-1_all.deb
            sudo apt install -y ./amdgpu-install_6.1.60101-1_all.deb
-           sudo amdgpu-install --accept-eula -y --usecase=rocm --no-dkms
+           sudo amdgpu-install --accept-eula -y --usecase=openmpsdk --no-dkms
 
       - name: Show version information
         run: |