chrt: Add uclamp reset support via -1 sentinel

chrt: Add uclamp reset support via -1 sentinel

Passing -1 to --clamp-min or --clamp-max sets the corresponding
sched_attr field to UINT32_MAX, which tells the kernel to reset
the utilization clamp to its system default. Resetting requires
kernel >= 5.11, otherwise the syscall will fail with EINVAL.

Closes: https://github.com/util-linux/util-linux/issues/4339
Suggested-by: Christian Goeschel Ndjomouo <cgoesc2@wgu.edu>
Signed-off-by: Furkan Caliskan <frn1furkan10@gmail.com>