Add event tracking when flows and agents are created, updated, and destroyed

About

We want to add event tracking when agents are created, updated, or destroyed.

Proposal

Add tracking events into the services that are added as part of:

• Backend: Add GraphQL mutation to create agent (#551282 - closed)
• Backend: Add GraphQL mutation to update agent (#553290 - closed)
• Backend: Add GraphQL mutation to destroy agent (#553293 - closed)

Proposed tracking events:

Create:

track_internal_event(
  "create_ai_item",
  user: current_user,
  project: project,
  additional_properties: {
    label: 'agent'
  }
)

Update:

track_internal_event(
  "update_ai_item",
  user: current_user,
  project: project,
  additional_properties: {
    label: 'agent'
  }
)

Delete:

track_internal_event(
  "delete_ai_item",
  user: current_user,
  project: project,
  additional_properties: {
    label: 'agent'
  }
)

See https://docs.gitlab.com/development/internal_analytics/internal_event_instrumentation/quick_start/.

In the above docs, it recommends a naming convention of <action>_<target_of_action>_<where/when>.

However, looking at other events that use #track_internal_event, they often don't mention <where/when>, so we could also not append that.