Fix mix output for mgrctl by using option -t

[maximenoel8]

What does this PR change?

Currently in our testsuite, the mgrctl command have unstable behavior related to https://github.com/SUSE/spacewalk/issues/25605
Without the option -t, the output come in disorder. See information in the bsc: https://bugzilla.suse.com/show_bug.cgi?id=1235603

It's a upstream issue and the bug is marked as RESOLVED WONTFIX. So we need to necessary changes on the testsuite side.

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

ℹ️ If a major new functionality is added, it is strongly recommended that tests for the new functionality are added to the Cucumber test suite

• No tests: already covered

• DONE

Links

Issue(s): https://github.com/SUSE/spacewalk/issues/25605
Port(s): https://github.com/SUSE/spacewalk/pull/26220

• DONE

Changelogs

Make sure the changelogs entries you are adding are compliant with https://github.com/uyuni-project/uyuni/wiki/Contributing#changelogs and https://github.com/uyuni-project/uyuni/wiki/Contributing#uyuni-projectuyuni-repository

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Re-run a test

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• Re-run test "backend_unittests_pgsql"
• Re-run test "java_pgsql_tests"
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• Re-run test "susemanager_unittests"
• Re-run test "javascript_lint"
• Re-run test "spacecmd_unittests"

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[github-actions]

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• https://github.com/uyuni-project/uyuni/actions/workflows/acceptance_tests_secondary.yml?query=event%3Aschedule

KNOWN ISSUES

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Happy hacking!
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