Save taggings data to individual tables

After #467196 (closed) and #467197 (closed) when a new job or runner is tagged, we must insert that data into their specific tables too along with the inserts into taggings.

This feature should be under a feature flag.

See the following child issues:

• for ci_build_tags: #472973 (closed)
• for ci_runner_taggings: #472974 (closed)