Draft: ci: Ensure crosvm-runner.sh terminates any hanging crosvm processes

Improve the crosvm wrapper script to force killing crosvm processes that still hang after a graceful termination attempt.

Additionally, update deqp-runner to an unofficial version providing support for graceful termination of child processes by sending the SIGTERM signal. This functionality is required by crosvm-runner to implement proper cleanup of virtio-vsock related resources. For more details, please see the related MR.

Signed-off-by: Cristian Ciocaltea cristian.ciocaltea@collabora.com