bots: Get release number for other fedoras
bots: Get release number for other fedoras

There are fedora-i386 and fedora-testing, which are both based on
fedora-30. When version is not number, use 30 instead. This needs to be
bumped once we move to different release.

Closes #12174

cockpituous/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,deryni/cockpit,deryni/cockpit,cockpituous/cockpit,martinpitt/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,garrett/cockpit,deryni/cockpit,martinpitt/cockpit,mvollmer/cockpit,deryni/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,deryni/cockpit,deryni/cockpit,garrett/cockpit,mvollmer/cockpit,cockpituous/cockpit,mvollmer/cockpit,martinpitt/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,garrett/cockpit,garrett/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,mvollmer/cockpit,cockpit-project/cockpit,martinpitt/cockpit,garrett/cockpit,moraleslazaro/cockpit,deryni/cockpit,cockpituous/cockpit,cockpit-project/cockpit