Copy generated /boot/grub2/grubenv to EFI dirs

There is an issue with grub2 in rhel-8.2 where generating grub.cfg in
an EFI directory will regenerate grubenv in /boot/grub2. Then when the
host is rebooted, the stale grubenv file in the EFI directory is used,
and any new kernal args are not used.

This change works around this by copying /boot/grub2/grubenv to the
EFI directories. Newer versions of grub2 many not show this behaviour
but the workaround can remain in place.

This change also adds /boot/efi/EFI/BOOT to the list of EFI
directories checked for, as it should have been in the original list.

See https://bugzilla.redhat.com/show_bug.cgi?id=1974507

Change-Id: I4f8664c9033502b25b40646cfd8976cc5638e643
(cherry picked from commit c1d4d602f8)

tripleo_ansible/roles/tripleo_kernel/tasks/kernelargs.yml

@@ -53,12 +53,23 @@
         path: "{{ item }}"
       register: grub_stat
       loop:
-        - /boot/grub2/grub.cfg
-        - /boot/efi/EFI/redhat/grub.cfg
-        - /boot/efi/EFI/centos/grub.cfg
-        - /boot/efi/EFI/fedora/grub.cfg
+        - /boot/efi/EFI/BOOT
+        - /boot/efi/EFI/redhat
+        - /boot/efi/EFI/centos
+        - /boot/efi/EFI/fedora
     - name: Generate grub config
-      command: "grub2-mkconfig -o {{ item.stat.path }}"
+      command: "grub2-mkconfig -o /boot/grub2/grub.cfg"
+
+    - name: Generate EFI grub config
+      command: "grub2-mkconfig -o {{ item.stat.path }}/grub.cfg"
+      when: item.stat.exists|bool
+      loop: "{{ grub_stat.results }}"
+
+    - name: Copy grubenv to EFI directory
+      copy:
+        remote_src: true
+        src: /boot/grub2/grubenv
+        dest: "{{ item.stat.path }}/grubenv"
       when: item.stat.exists|bool
       loop: "{{ grub_stat.results }}"
     - name: Set reboot required fact