Upgraded the Acts As Taggable gem

**What does this MR do?**
It upgrades the acts-as-taggable gem

**Why is this MR needed?**
It removes the patch from the initialisers, it also adds some possible hooks for speed improvements (tags#taggings_count). But I think the important part is the removal of the acts_as_taggable_patch.rb

**Does the reviewer have to watch for something?**
Yeah, please wait for the tests to finish. Didn't run the full suite locally.