[plugins] Apply --skip-files also to destination of symlinks

[pmoravec]

Resolves: #3767

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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-3767
• And now you can install the packages.

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

[pmoravec]

Reproducer:

mkdir /opt/topsecret
echo "my secret" > /opt/topsecret/secretfile
ln -s /etc/systemd/system/secret  /opt/topsecret/secretfile
sos report --batch --build -o systemd --skip-files="/opt/topsecret/*"

Then, collected sosreport still has:

# file /var/tmp/sosreport-pmoravec-rhel9-2024-08-30-iwucpyj/etc/systemd/system/secret 
/var/tmp/sosreport-pmoravec-rhel9-2024-08-30-iwucpyj/etc/systemd/system/secret: symbolic link to ../../../opt/topsecret/secretfile
# file /var/tmp/sosreport-pmoravec-rhel9-2024-08-30-iwucpyj/opt/topsecret/secretfile 
/var/tmp/sosreport-pmoravec-rhel9-2024-08-30-iwucpyj/opt/topsecret/secretfile: ASCII text
# cat /var/tmp/sosreport-pmoravec-rhel9-2024-08-30-iwucpyj/opt/topsecret/secretfile 
Fri Aug 30 03:57:34 PM CEST 2024
#