Followup 72c4709a5a
Previously we made a fix to allow skip validations when tagging
a topic via TopicCreator. However, this flow also skips a lot of
the more in-depth work on tags we do when creating a topic, like
processing tag synonyms. When approving reviewable queued posts,
we skip validations, so this would cause an issue where a topic
was approved and the tag synonyms weren't applied.
This commit changes the logic so we attempt the more complete
`DiscourseTagging.tag_topic_by_names` call first and if this fails
and skip validations is on, then we do
`DiscourseTagging.add_or_create_tags_by_name`.
This at least gives a chance for the full workflow to work first.
35507d4090