[O11y][AWS Lambda] Lens Migration

[milan-elastic]

Migrate AWS Lambda visualizations to the lens in the current Kibana version 8.7.1 itself.

Preparation of data for testing

• Use sample_event.json / setup live instance using docker / mock data using a mock server to populate dashboards

Migration stats

AWS Lambda Dashboards	Before Migration		After Migration
	Lens	Visualization	Lens	Visualization
Dashboards	4	0	4	0

Dashboard : [Metrics AWS] Lambda Overview

• Migrate x visualization to the lens.
  • PR link

Verification and Validation

• Verification of functionality remains the same after migration in Kibana
• Verification of data count of after-migrated visualization with before-migrated visualization in Kibana
• Verification of Dashboards is not distorted in the supported Kibana version 8.7.1

[gpop63]

This has been merged #5455