[Rabbitmq] modify the dimension field mapping to support public cloud d…

[ritalwar]

• Bug

What does this PR do?

This PR updates the dimension fields to support public cloud deployment for rabbitmq.

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.

Related issues

• Relates [Meta][TSDB] Modify the dimension field mapping to support public cloud deployment #6031

[elasticmachine]

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• Start Time: 2023-05-11T03:59:17.630+0000

• Duration: 14 min 46 sec

Test stats 🧪

Test	Results
Failed	0
Passed	12
Skipped	0
Total	12

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚 2.016
Classes	100.0% (1/1)	💚 2.016
Methods	70.0% (14/20)	👎 -24.394
Lines	73.913% (34/46)	👎 -19.412
Conditionals	100.0% (0/0)	💚

[agithomas]

LGTM!

[elasticmachine]

Package rabbitmq - 1.8.8 containing this change is available at https://epr.elastic.co/search?package=rabbitmq