[grub2] Capture /etc/grub2-efi.cfg

[jcastill]

sos report does not gather the symlink
/etc/grub2-efi.cfg when present.
If a system is legacy, but has this file,
grubby default to using this one first in
some cases. Therefore we need to know if
it's present or not.

Closes: RHBZ#2218563

---

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[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo yum install -y dnf-plugins-core on RHEL 8
• sudo dnf install -y dnf-plugins-core on Fedora
• dnf copr enable packit/sosreport-sos-3294
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.