[O11y][GCP Billing] Lens Migration

[rajvi-patel-22]

Manually migrate GCP Billing 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

Migration Stats:

	Before Migration			After Migration
Dashboad Name	Lens	Visualization	Old control panel Lens	Visualization	New input controls
Billing overview	4	0	1	4	0	1

Dashboard : [GCP Billing] Billing overview

• Migrate 1 old controls to new input controls.
  • Migrate GCP Billing input control to new control panel #7249

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 (TBD)