[O11y][Oracle] Migrate Sysmetrics dashboard visualizations to lens in kibana 8.6.0

[harnish-elastic]

• Enhancement

What does this PR do?

• Migrate visualizations to lens for Oracle integration package

• Statistics for Oracle Lens migration:

Oracle Dashboards	Before Migration		After Migration
	Lens	Visualization	Lens	Visualization
[Metrics Oracle] Sysmetrics	0	15	15	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 Kibana version 8.6.0.

Related issues

• Relates
  • Lens Migration of OBS integrations #5221
  • [O11y][Oracle] Lens Migration #5753

Note: - Previously the sysmetric dashboard divided into two screenshot. We have provided whole dashboard in one screenshot. Hence we have removed entry for second sysmetric dashboard screenshot from manifest.yml file

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• Start Time: 2023-03-30T16:52:34.438+0000

• Duration: 30 min 41 sec

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Name	Metrics % (covered/total)	Diff
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Methods	100.0% (29/29)	💚
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[milan-elastic]

Thanks, @harnish-elastic! Looks good, Approved!

[agithomas]

Please explain the reason for kibana version change.

[kush-elastic]

Please explain the reason for kibana version change.

We have already provided the reason behind why we are migrating to Kibana version 8.6.0 in the issue itself. The reason behind why we have mentioned there is that the dashboard (System Statistics) which lets us use kibana 8.6.0 is different from this PR.

[agithomas]

LGTM!