QE: Kill the openSUSE Leap repo sync

[nodeg]

What does this PR change?

Kills the openSUSE Leap 15.4 reposyncing to see if we are able to bootstrap the openSUSE minion in the Uyuni CI.
See https://github.com/SUSE/spacewalk/issues/22336

GUI diff

No difference.

Before:

After:

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• Cucumber tests were added

• DONE

Links

• 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

If you don't need a changelog check, please mark this checkbox:

• No changelog needed

If you uncheck the checkbox after the PR is created, you will need to re-run changelog_test (see below)

Re-run a test

If you need to re-run a test, please mark the related checkbox, it will be unchecked automatically once it has re-run:

• Re-run test "changelog_test"
• Re-run test "backend_unittests_pgsql"
• Re-run test "java_pgsql_tests" (Test skipped, there are no changes to test)
• Re-run test "schema_migration_test_pgsql"
• Re-run test "susemanager_unittests"
• Re-run test "javascript_lint"
• Re-run test "spacecmd_unittests"

[nodeg]

PR test: https://ci.suse.de/view/Manager/view/Uyuni-PRs/job/uyuni-prs-ci-tests/2509