[report] Don't use sysroot for network device enumeration

[TurboTurtle]

If sos is being used in a live environment to diagnose an issue, using sysroot can cause the network device enumeration via /sys/class/net crawling to fail. This will be the case for systems that do not use nmcli.

When in a live environment, network devices will not be under /$sysroot/sys/class/net but the "regular" path for the booted environment. Similarly, if sos is being run in a container that is properly configured, network devices will appear under /sys/class/net and not (necessarily) under the sysroot path that mounts the host's filesystem.

As such, disregard a configured sysroot when enumerating network devices by crawling /sys/class/net, and trap any exceptions that may percolate up from this in edge case environments.

Closes: #3307

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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-3313
• And now you can install the packages.

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

[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-3313
• And now you can install the packages.

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

[TurboTurtle]

I updated the commit message to be Related rather than Closes, since that issue has multiple fronts.