models: Allow using any version value for min_version
In commit 80c00c5c ("Only display the configured number of results"), a min_version field was added to set the minimum version of the results to show.
This field was limited to a series value (v2021 was allowed but not v2022pre).
This commit changes that so that any version value can be used.
This removes the filtering in the SQL query and moves it to
post-filtering with the packages python module.