Remove firstArrivingMeterValueIfMultiple

[goekay]

Checklist

• [x] I checked other issues already and found no answer
• [x] I checked the documentation and found no answer
• [x] I am running the latest version and the feature i am requesting is not implemented there

Describe the problem you are trying to solve

I think this flag/feature is causing more harm than good. We should maybe question the added value of having it.

Describe alternative solutions or features you've considered

There are PRs that address the issues such as https://github.com/steve-community/steve/pull/1013 and https://github.com/steve-community/steve/pull/1164

Describe the solution you'd like

I am inclined to remove it altogether (instead of fixing it) and return the raw data from the table. Fixing it means adding more code that would make a complicated part even more complicated. Therefore, I ask the authors of these PRs and the wider community for their feedback.

Additional context

• https://github.com/steve-community/steve/issues/1004

[fnkbsi]

With the current implementation, the reduction of MeterValues is not important. However, two potential new features could benefit from this:

• Export of transaction details / MeterValues as CSV (works also without a "data reduction")
• Visualization of the transaction / charging process using SVG graphics

What I definitely don't need is the data reduction with the last arriving MeterValue (firstArrivingMeterValueIfMultiple == false).