Adding cluster linking metrics

[danielpetisme]

Description

Updating the JMX exporter rules to include cluster linking metrics as defined in https://docs.confluent.io/platform/current/multi-dc-deployments/cluster-linking/metrics.html#monitoring-cluster-metrics-and-optimizing-links

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

This config is supporting the following demo
https://github.com/vdesabou/kafka-docker-playground/tree/master/other/monitoring-cluster-linking

Checklist:

• Any variable/code changes have been validated to be backwards compatible (doesn't break upgrade)
• I have added tests that prove my fix is effective or that my feature works
• If required, I have ensured the changes can be discovered by cp-ansible discovery codebase
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[mansisinha]

Suggested change

	"$1: "$2"
	"$1": "$2"

[mansisinha]

Hi @danielpetisme , thanks for your contribution. Please add the missing quotes that I've suggested and raise PR against branch 7.0.x

[cla-assistant]

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