[Couchbase] Add dimensions mapping to query_index datastream

[agithomas]

• Enhancement

What does this PR do?

Add dimensions to query_index 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 - Dashboard does not exist. All other dashboard panels rendering correctly.

• 4. Index template verification

• 5. Index mapping verification

• 6. Index settings verification.

• 7. Index rollover after TSDB disablement verification

Related issues

• Relates [Couchbase] TSDB Enablement #7378

Screenshots

[agithomas]

I could not find any related dashboards. So, skipping the dashboard tests.

[agithomas]

Verified TSDB enablement

[agithomas]

Index rollover testing

{ "acknowledged": true, "shards_acknowledged": true, "old_index": ".ds-metrics-couchbase.query_index-default-2023.08.30-000003", "new_index": ".ds-metrics-couchbase.query_index-default-2023.08.30-000004", "rolled_over": true, "dry_run": false, "conditions": {} } 

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-09-06T09:36:13.630+0000

• Duration: 27 min 4 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)	💚

[ritalwar]

LGTM!

[elasticmachine]

Package couchbase - 1.2.6 containing this change is available at https://epr.elastic.co/search?package=couchbase