Documentation: Add using mock explanation for testing (#46360)
Documentation: Add using mock explanation for testing (#46360)

* Add using mock explanation for testing

* Update information of how to add go:generate in code

Co-authored-by: Marcus Efraimsson <c11bb2318bc5401baeed0fcccbc65cd156dad485@gmail.com>

Co-authored-by: Marcus Efraimsson <c11bb2318bc5401baeed0fcccbc65cd156dad485@gmail.com>
grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana