[plugins,distros] Resolve code alerts for file not always closed

[TurboTurtle]

Fix a number of outstanding "File is not always closed" errors highlighted by GitHub's code scanning.

This involves (almost exclusively) changing such as:

   for line in open('/some/file', 'r').read().splitlines():

To using a context manager to ensure the file is always closed:

   with open('/some/file', 'r') as sfile:
       for line in sfile.read().splitlines():

...or something similar. Overall the logic of what a specific block of code was doing (mostly in plugins) is not changed however.

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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-3360
• And now you can install the packages.

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