Dynamic Dashboard: Add missing events for dashboard card performance

[itsmeichigo]

Event list:

Event	Trigger	Properties
*_dynamic_dashboard_card_data_loading_started	When a dashboard card starts loading data.	type: card type name
*_dynamic_dashboard_card_data_loading_completed	When a dashboard card completes loading data without error	type: card type name
*_dynamic_dashboard_card_data_loading_failed	When a dashboard card fails to load data	type: card type name, error: error details

Internal discussion: pe5sF9-2PV-p2#comment-3718

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.