[O11y][Couchbase] Lens migration for visualizations to kibana version 8.4.0

[harnish-elastic]

• Enhancement

What does this PR do?

• Migrate visualizations to lens for Couchbase integration package

• Node CPU Utilization [Metrics Couchbase] visualization before migration containing the Gradient color palette which is not available in lens. Also we haven't find the nearest color palette in lens. Hence we have kept color palette as default.

• Statistics for Couchbase Lens migration:

Couchbase dashboards	Before Migration		After Migration
	Lens	Visualization	Lens	Visualization
[Metrics Couchbase] Sync Gateway Overview	18	0	18	0
[Metrics Couchbase] Node Overview	0	4	4	0
[Metrics Couchbase] Metrics Overview	0	7	7	0
[Metrics Couchbase] XDCR Overview	7	0	7	0
	25	11	36	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 8.4.0.

Related issues

• Relates Lens Migration of OBS integrations #5221

Issues Identified

• Show value in legend feature does not show default values in legend. It will only appear in legend when user hover over the chart.
  [Lens] Area/line charts report last bucket empty kibana#153079
• Gradient and rainbow color palettes are not available in lens and won't be available in the future versions as well. Hence, the closest color palettes (positive and negative) have been used.
  [Lens] Support for Gradient and Rainbow color palette in Lens kibana#152699

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Build stats

• Start Time: 2023-03-21T15:04:55.300+0000

• Duration: 28 min 39 sec

Test stats 🧪

Test	Results
Failed	0
Passed	45
Skipped	0
Total	45

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (10/10)	💚
Files	100.0% (10/10)	💚
Classes	100.0% (10/10)	💚
Methods	100.0% (72/72)	💚 2.353
Lines	100.0% (1076/1076)	💚 12.54
Conditionals	100.0% (0/0)	💚

[kush-elastic]

LGTM!

[agithomas]

LGTM!

[elasticmachine]

Package couchbase - 0.14.0 containing this change is available at https://epr.elastic.co/search?package=couchbase