use massTag for bulk-tag-builds on koji > 1.30

[obriencj]

A new massTag API was introduced in koji 1.30 on the hub side. This acts similarly to the tagBuildBypass call, but accepts multiple builds.

https://pagure.io/koji/issue/3307
https://pagure.io/koji/pull-request/3308#_2__37

Let's add a detect in KSD and switch to that API where applicable.

[obriencj]

In theory this is "nicer" to koji, consuming fewer bandwidth and memory resources.

However we must note that the massTag implementation specifies behavior identical to having force=True, notify=False and thus may not be correct to use in all cases.

[obriencj]

need to identify what the behavior is for per-build failures here. If it's not compatible, we may need to stick with multicall tagBuildBypass after all