[O11y][Nagios XI] Lens Migration

[rajvi-patel-22]

Manually migrate Nagios XI visualizations to lens in current Kibana version 8.3.0 itself.

Preparation of data for testing

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

Migration stats

Nagios XI dashboard	Before Migration		After Migration
	Lens	Visualization	Lens	Visualization
[Metrics Nagios XI] Hosts Dashboard	6	1	6	1
[Metrics Nagios XI] Overview	5	1	5	1
[Metrics Nagios XI] Events Dashboard	0	1	0	1
[Metrics Nagios XI] Services Dashboard	10	2	10	1
	21	5	21	4

Note: One visualization is migrated to the new control panels. Count of visualization is 4 after migration because all the dashboards have 1 markdown visualization whose alternative is not available in Lens hence we have not migrated those.

Data stream : Service

• Migrate 1 visualization to the control panel.
  • [O11y][Nagios XI] Lens migration for visualizations to Kibana version 8.3.0 #5573

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 Dashboard are not distorted in supported Kibana version (8.3.0)

[rajvi-patel-22]

PR is approved and merged, hence closing this issue: #5573