Description:

Special goal metrics added in AddColumnsProcessedMetricsGoal are not currently displaying in processed report output, but they need to be for API consumers like the Looker Studio connector to be able to use them. This PR makes sure they are in report metadata for the appropriate Actions reports, and are calculated properly when requesting processed report data.

Changes:

• Move the code to determine what processOnlyIdGoal in AddColumnsProcessedMetricsGoal should be from the Goals visualization to AddColumnsProcessedMetricsGoal.
• Use this new method in ProcessedReport to compute the correct methods for Actions processed reports.
• In Goals.php in the getReportMetadataEnd hook, make sure the different metrics computed by AddColumnsProcessedMetricsGoal are included in report metadata for the appropriate Actions reports.
• Bug fix: I noticed that this metric was using the wrong value for the translated name: https://github.com/matomo-org/matomo/blob/5.x-dev/plugins/Goals/Columns/Metrics/GoalSpecific/ConversionsEntry.php#L32
• Bug fix: I noticed that the wrong idGoal override appears to be used in the existing code on 5.x-dev: https://github.com/matomo-org/matomo/blob/5.x-dev/plugins/Goals/Visualizations/Goals.php#L48. The condition checks for an Actions page report, but sets the idGoal value to GOALS_ENTRY_PAGES_ECOMMERCE instead of GOALS_PAGES_ECOMMERCE.
• Add a processed report test for an Actions page group w/ goal metrics.

Requested by @mattab for the Looker Studio connector.

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed