database_observability: add cloud provider labels to all metrics #4942
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PR Description
This change adds cloud provider information as labels to all metrics exported by the
database_observabilitycomponents. This enables more effective correlation and attribution across Grafana Cloud.Some of the implementation is duplicated across MySQL and Postgres components. The reasoning being that cloud-providers sometimes vary their naming / URI structure to include engine information. Keeping things strongly tied to the database engine helps make this determination easier.
Which issue(s) this PR fixes
Notes to the Reviewer
PR Checklist