[MySQL] Added missing dimensions to the performance datastream

[agithomas]

• Bug

Proposed commit message

Added missing dimension, table_io_waits.index.name, to the performance datastream, to resolve missing data problem

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.

Author's Checklist

• elastic-package build
• elastic-package stack up -v -d --services package-registry

How to test this PR locally

Manual verification

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[elasticmachine]

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• Commit: ecb0951

[elastic-sonarqube]

Quality Gate passed

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[ritalwar]

Can you please add the link to the issue solved by this PR?
Also, could we explain in more detail in description why the index name should be a dimension?

[ritalwar]

Changes LGTM!

[elasticmachine]

Package mysql - 1.18.1 containing this change is available at https://epr.elastic.co/search?package=mysql