[Couchbase] Add dimension mapping to cbl_replication datastream

[agithomas]

• Enhancement

What does this PR do?

Add dimensions to bucket datastream

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.
• I have verified that Kibana version constraints are current according to guidelines.

How to test this PR locally

1. Build verification
   elastic-package build
elastic-package stack up -v -d --services package-registry

• 2. Document count verification after enablement
• 3. Dashboard verification after enablement
• 4. Index template verification
• 5. Index mapping verification
• 6. Index settings verification.

Related issues

• Relates [Couchbase] TSDB Enablement #7378

Screenshots

[agithomas]

Dashboard validation

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-08-23T08:17:32.033+0000

• Duration: 29 min 30 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)	💚
Lines	100.0% (1076/1076)	💚
Conditionals	100.0% (0/0)	💚

[agithomas]

Timeseries enablement validated

[ritalwar]

LGTM!

[elasticmachine]

Package couchbase - 1.2.2 containing this change is available at https://epr.elastic.co/search?package=couchbase