Ensure goal sparklines show the correct goal #19226

Description:

It seems the idGoal parameter got lost for the sparklines. Or maybe it never worked....

fixes #19206

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

Seems all related tests are still passing. That actually indicates that our UI tests are not that good. At some point we maybe should consider creating a new & bigger dataset for our UI tests, so there is also some historical data, that can be shown in the sparklines.
But doing that might be a bit out of scope for this fix. Guess we should keep that in mind for Matomo 5 maybe.