Change CPE platform

This commit changes CPE platform to `system_with_kernel` in all rules
that use the `grub2_bootloader_argument_absent`. These rules configure
kernel arguments, therefore it makes sense to have them applicable on
systems that contain kernel, including bootable containers.

linux_os/guide/system/bootloader-grub2/grub2_mitigation_argument/rule.yml

@@ -24,7 +24,7 @@ references:
     srg: SRG-OS-000480-GPOS-00227
     stigid@ol8: OL08-00-010424
 
-platform: grub2
+platform: system_with_kernel
 
 ocil_clause: 'mitigations is set to off'
 

linux_os/guide/system/bootloader-grub2/grub2_nosmap_argument_absent/rule.yml

@@ -34,7 +34,7 @@ ocil: |-
     <pre>grep -q nosmap /boot/config-`uname -r`</pre>
     If the command returns a line, it means that SMAP is being disabled.
 
-platform: machine
+platform: system_with_kernel
 
 template:
     name: grub2_bootloader_argument_absent

linux_os/guide/system/bootloader-grub2/grub2_nosmep_argument_absent/rule.yml

@@ -34,7 +34,7 @@ ocil: |-
     <pre>grep -q nosmep /boot/config-`uname -r`</pre>
     If the command returns a line, it means that SMEP is being disabled.
 
-platform: machine
+platform: system_with_kernel
 
 template:
     name: grub2_bootloader_argument_absent

linux_os/guide/system/bootloader-grub2/grub2_systemd_debug-shell_argument_absent/rule.yml

@@ -44,7 +44,7 @@ ocil: |-
 fixtext: |-
     {{{ fixtext_grub2_bootloader_argument_absent("debug-shell") | indent(4) }}}
 
-platform: machine
+platform: system_with_kernel
 
 template:
     name: grub2_bootloader_argument_absent