Added Timeline Events to Respond GMAU

What does this MR do and why?

Describe in detail what your merge request does and why.

Adding timeline events to be sure they are included for Respond Group GMAU.

• Add incident_management_timeline_event_total_unique_counts_weekly to incident_management_total_unique_counts_weekly
• Add incident_management_timeline_event_total_unique_counts_monthly to incident_management_total_unique_counts_monthly

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