fix: use the 'tar' filter to remove warnings

[davidfestal]

Description

Since recently on both docker images, which have been updated, the following warning is displayed in the initContainer logs during dynamic plugins installation:

==> Extracting package archive /dynamic-plugins-root/janus-idp-backstage-plugin-topology-1.16.4.tgz
/usr/lib64/python3.9/tarfile.py:2239: RuntimeWarning: The default behavior of tarfile extraction has been changed to disallow common exploits (including CVE-2007-4559). By default, absolute/parent paths are disallowed and some mode bits are cleared. See https://access.redhat.com/articles/7004769 for more details.

This is because a new filter option option has been added in the python tar library, whose default value changes the default behavior of the library.

Explicitely setting this filter option to tar (which is the new default) should remove the warning from the logs.

Which issue(s) does this PR fix

No issue

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
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0.0% Duplication

[nickboldt]

sure

[nickboldt]

cherrypicked as b2b8824

[github-actions]

The image is available at: quay.io/janus-idp/backstage-showcase:pr-768!