Update sudoers rules in RHEL8 STIG V1R5
Add missing SRG references in RHEL8 STIG V1R5 rules
Update chronyd_or_ntpd_set_maxpoll to disregard server and poll directives
Fix GRUB2 rule template to configure the module correctly on RHEL8
Update GRUB2 rule descriptions
Make package_rear_installed not applicable on AARCH64
Resolves: rhbz#2045403
Resolves: rhbz#2014561
Resolves: rhbz#2020623
