[couchbase] Add Integration Package with Node Data Stream

[bhagyaraj-crest]

• Enhancement

What does this PR do?

• Generated the skeleton of Couchbase integration package.
• Added 1 data stream ( node )
• Added data collection logic.
• Added the ingest pipelines.
• Mapped fields according to the ECS schema and added Fields metadata in the appropriate yml files.
• Added system test cases.
• Update Manifest related changes to bring host variables in the package level and also update relative changes in the .hbs files and test files

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

[elasticmachine]

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Build stats

• Start Time: 2022-10-11T12:48:37.384+0000

• Duration: 30 min 18 sec

Test stats 🧪

Test	Results
Failed	0
Passed	41
Skipped	0
Total	41

🤖 GitHub comments

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[yug-rajani]

/test

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (10/10)	💚
Files	100.0% (10/10)	💚 2.525
Classes	100.0% (10/10)	💚 2.525
Methods	100.0% (72/72)	💚 9.359
Lines	100.0% (1076/1076)	💚 8.626
Conditionals	100.0% (0/0)	💚

[yug-rajani]

/test

[yug-rajani]

LGTM
Please change as per the nits suggested in #3666

[kush-elastic]

/test

[elasticmachine]

🚀 Benchmarks report

Package couchbase 👍(7) 💚(2) 💔(1)

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Data stream	Previous EPS	New EPS	Diff (%)	Result
cluster	19607.84	16129.03	-3478.81 (-17.74%)	💔

To see the full report comment with /test benchmark fullreport