[FEATURE] GoldenGate Metrics

[anders-swanson]

Summary

Integrate GoldenGate metrics to the Oracle Database Metrics Exporter.

Specific GoldenGate metrics related to cache, lag, etc. are queryable from the database host.

Motivation

Provide out-of-the-box support to GoldenGate users.

Proposed Solution

(1) Include a custom metrics file, goldengate.toml, with metrics for GoldenGate users. GoldenGate users can include this file when connecting the metrics exporter to database installations with GoldenGate.

(2) Include a sample Grafana dashboard (in exported JSON format) for GoldenGate metrics.

Alternatives Considered

n/a

Additional Context

n/a