Bugfixes
- Taught pulp_rpm to be more lenient in the face of non-standard repos.
(backported from 7208)
[9192](https://pulp.plan.io/issues/9192)
- Fixed Pulp 3 to Pulp 2 sync for the package groups with empty packagelist, e.g. RHEL8 Appstream repository.
(backported from 8713)
[9193](https://pulp.plan.io/issues/9193)
- Taught downloader to be handle rpms with special characters in ways Amazon likes.
(backported from 8875)
[9198](https://pulp.plan.io/issues/9198)
- Fixed multiple bugs in distribution tree metadata generation regarding "variant" and "variants" metadata.
(backported from 8622)
[9218](https://pulp.plan.io/issues/9218)
- Unpublished content is no longer available for consumption.
(backported from 9223)
[9226](https://pulp.plan.io/issues/9226)
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