Reduce telemetry insert to one query that does nothing on conflict

[tempoz]

This reduces the number of queries we issue and also fixes a time-of-check, time-of-use problem that otherwise exists.

Related issues: N/A

[tempoz]

• Remove unnecessary select in delete invocation with perms #6043 : 2 dependent PRs (#6044 , #6045 )
• Remove unnecessary select statement when updating targets #6014
• Uses a single query instead of two queries to retrieve a user by subid #6012
• Removes unnecessary select and fixes potential time-of-check, time-of-use problem #6010
• Reduce telemetry insert to one query that does nothing on conflict #6003 👈
• initial insert when registering invocation attempt doesn't need to be in a transaction #5865 : 1 other dependent PR (#5875 )
• Only perform the select to determine if there is no related execution row after attempting an update #6002
• master

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