* add dnf_contentdir library function and implement is sample tests
* Short circuit auto addition of _console_wait_login for tests without DESKTOP
* support use of REPOSITORY_GRAPHICAL and ADD_REPOSITORY_GRAPHICAL test variables
* deprecate addition of dnf_contentdir lib function
* create and use get_version_major utility function
* resolve mismatch of login type caused by incorrect template entries
* add and use _staging_repos_enable post-install test
* add install_package_set_* tests only to package-set flavor
* fix variable re-declaration warning/error
* add rocky-getting-started-tour needles
* release rocky-repos content require switch from mirrorlist to baseurl
* implement DNF_CONTENTDIR swap as post-install action before reboot/login
* temp disable _staging_repos_enable
* incomplete fix for _graphical_wait_login
- get_release_number is used heavily in our openQA but makes no sense in
Rocky. Multiple possible solutions but this one allows
`_graphical_wait_login` to pass. NEEDS_WORK
