redhat/configs: Move CONFIG_BLK_CGROUP_IOCOST=y to common/generic
RHEL is going to enable CONFIG_BLK_CGROUP_IOCOST to support podman 5.0. Move the Fedora's "CONFIG_BLK_CGROUP_IOCOST=y" config to common/generic as RHEL and Fedora will now have the same config setting.
Signed-off-by: Waiman Long longman@redhat.com