[GPUP][CMake] Install GPUProcess for the non-mac ports with ENABLE_GPU_PROCESS=ON
Pull request: https://github.com/WebKit/WebKit/pull/20828
Committed 271066@main (5a5dc5a5c268): <https://commits.webkit.org/271066@main> Reviewed commits have been landed. Closing PR #20828 and removing active labels.