[hailctl] use execvp for hailctl curl (#9507)
[hailctl] use execvp for hailctl curl (#9507)


hail-is/hail,cseed/hail,hail-is/hail,hail-is/hail,danking/hail,hail-is/hail,cseed/hail,danking/hail,danking/hail,cseed/hail,danking/hail,danking/hail,cseed/hail,hail-is/hail,cseed/hail,hail-is/hail,cseed/hail,hail-is/hail,cseed/hail,danking/hail,hail-is/hail,danking/hail,cseed/hail,danking/hail