[O11y][CoreDNS] Migrate CoreDNS visualizations to lens in kibana 8.0.0

[rajvi-patel-22]

• Enhancement

What does this PR do?

• Migrate visualizations to lens for CoreDNS integration package

• Statistics for CoreDNS Lens migration:

CoreDNS Dashboards	Before Migration		After Migration
	Lens	Visualization	Lens	Visualization
[Filebeat CoreDNS] Overview	0	4	4	0
	0	4	4	0

Checklist

• I have added an entry to my package's changelog.yml file.
• I have verified that panels are populated with data.
• I have verified that panels are not distorted after being migrated to lens.
• I have updated screenshots of dashboard.
• I have verified that data count are matching and panel aggregations are same as before.

Author's Checklist

• Migrated panels should be removed from visualization folder.
• Migrated visualizations are populating in current Kibana version 8.0.0 itself.

Related issues

• Relates Lens Migration of OBS integrations #5221

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-04-12T04:41:17.593+0000

• Duration: 15 min 39 sec

Test stats 🧪

Test	Results
Failed	0
Passed	8
Skipped	0
Total	8

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (2/2)	💚
Classes	100.0% (2/2)	💚
Methods	95.455% (21/22)	❕
Lines	85.492% (165/193)	❕
Conditionals	100.0% (0/0)	💚

[milan-elastic]

Thanks, @rajvi-elastic! Approved!

[agithomas]

LGTM!

[elasticmachine]

Package coredns - 0.3.0 containing this change is available at https://epr.elastic.co/search?package=coredns