Bulk insert tags for Ci::Runner creation

What does this MR do and why?

Bulk insert tags for Ci::Runner creation

The normal route for tag creation is

• buggy.
• If !83709 (merged) fixes the bug, creates a sub-transaction for each tag.

So we re-use existing bulk tag creation to bulk insert tags when creating a new CI runner with tags.

See !83709 (comment 893953701)

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