images: Update the tests for Fedora 39

[debarshiray]

The translations for the RPM manuals were removed upstream during the RPM 4.19 development cycle [1]. So, replace them with rpm2cpio(8), which is another popular command shipped by the rpm package.

[1] RPM commit 4df74a9644b18136 https://github.com/rpm-software-management/rpm/commit/4df74a9644b18136 https://github.com/rpm-software-management/rpm/pull/2245

[softwarefactory-project-zuul[bot]]

Build failed. https://softwarefactory-project.io/zuul/t/local/buildset/9f0af0c29be54bf4a1edc5459f6a095f

:heavy_check_mark: unit-test SUCCESS in 9m 02s :heavy_check_mark: unit-test-migration-path-for-coreos-toolbox SUCCESS in 4m 04s :heavy_check_mark: unit-test-restricted SUCCESS in 8m 00s :x: system-test-fedora-rawhide FAILURE in 43m 35s :x: system-test-fedora-39 FAILURE in 42m 29s :heavy_check_mark: system-test-fedora-38 SUCCESS in 38m 41s :heavy_check_mark: system-test-fedora-37 SUCCESS in 37m 31s

[debarshiray]

These failures are because of some changes in GNU roff 1.23:

fedora-rawhide | not ok 3 help: Command 'help' in 222ms
fedora-rawhide | # (from function `assert_line' in file test/system/libs/bats-assert/src/assert.bash, line 479,
fedora-rawhide | #  in test file test/system/002-help.bats, line 50)
fedora-rawhide | #   `assert_line --index 3 --partial "toolbox - Tool for containerized command line environments on Linux"' failed
fedora-rawhide | # /usr/bin/man
fedora-rawhide | #
fedora-rawhide | # -- line does not contain substring --
fedora-rawhide | # index     : 3
fedora-rawhide | # substring : toolbox - Tool for containerized command line environments on Linux
fedora-rawhide | # line      :        toolbox ‐ Tool for containerized command line environments on Linux
fedora-rawhide | # --
fedora-rawhide | #