[couchbase] Add Integration Package with Dashboard

[kush-elastic]

• Enhancement

What does this PR do?

• Three Dashboards related to Couchbase metrics

Metrics overview dashboard

Node dashboard

XDCR overview dashboard

Sync Gateway overview dashboard

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• If I'm introducing a new feature, I have modified the Kibana version constraint in my package's manifest.yml file to point to the latest Elastic stack release (e.g. ^7.13.0).

How to test this PR locally

• Clone integrations repo.
• Install elastic-package locally.
• Start elastic stack using elastic-package.
• Move to integrations/packages/couchbase directory.
• Run the following command to run tests.

elastic-package test

Related issues

• Relates [couchbase] Add Integration Package with Bucket Data Stream #3666
• Relates [couchbase] Add Integration Package with Cluster Data Stream #3706
• Relates [couchbase] Add Integration Package with Node Data Stream #3771
• Relates [Couchbase] Update manifest file for bucket data stream #3900
• Relates [couchbase] Add Integration Package with CBL Replication Data Stream #3947
• Relates [couchbase] Add Integration Package with Resource Data Stream #3971
• Relates [couchbase] Add Integration Package with Cache Data Stream #3982
• Relates [couchbase] Add Integration Package with Database Stats Data Stream #4000
• Relates [couchbase] Add Integration Package with Delta Sync Data Stream  #4027
• Relates [couchbase] Add Integration Package with Miscellaneous Data Stream #4054
• Relates [couchbase] Add Integration Package with XDCR Data Stream #4073
• Relates [couchbase] Add Integration Package with query_index Data Stream #4100

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Build stats

• Start Time: 2022-10-18T09:37:08.594+0000

• Duration: 34 min 51 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)	💚 2.496
Classes	100.0% (10/10)	💚 2.496
Methods	100.0% (72/72)	💚 9.669
Lines	100.0% (1076/1076)	💚 8.453
Conditionals	100.0% (0/0)	💚

[elasticmachine]

🚀 Benchmarks report

Package couchbase 👍(6) 💚(2) 💔(2)

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Data stream	Previous EPS	New EPS	Diff (%)	Result
bucket	23809.52	15873.02	-7936.5 (-33.33%)	💔
database_stats	38461.54	27777.78	-10683.76 (-27.78%)	💔

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