[cleaner] set mapper to initializing during prepper work

[pmoravec]

.. and call generate_compiled_regexes at the end. This prevents repetitive and redundant calling the method for each found item.

Resolves: #4356
Closes: #4357

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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 dnf install -y 'dnf*-command(copr)'
• dnf copr enable packit/sosreport-sos-4357
• And now you can install the packages.

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

[pmoravec]

This is a regression since 4.11.[0-1]ish time (I didnt perform precise dissect), so I would like to have it merged into 4.11.2 - could either @TurboTurtle or @arif-ali review it, pretty please?

Reproducer is trivial:

for i in $(seq 1 50); do
    for j in $(seq 2 51); do
        echo 20.40.${i}.${j} host${i}-${j} host${i}-${j}.some.domain.com
    done
done > /etc/hosts

sos report -o networking,host --batch --build

.. and call rm -rf /etc/sos/cleaner/; sos clean on the generated sosreport directory.

[pmoravec]

Kindly asking @arif-ali and/or @TurboTurtle for a review - I would like to fix this regression till the next release scheduled for the next week.