Triggering internal event without associated metric leads to an error

Problem

Taken from !146699 (comment 1829990963):

When I first created the event definition, I did not generate associated metrics. I wired the event up in the UI, but got an error that the event was not registered whenever I triggered it. The source suggested that we load metric definitions and then pull events off of those, so I added the metric definitions shown here. The event worked as expected after that.

Desired Outcome

Events should be triggerable without an associated metric in case someone has no desire to record the event on Self-Managed.

Potential Solution

TBD

How to verify

TBD

Further actions needed

TBD